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d02ed0bb MM |
1 | /* Process record and replay target for GDB, the GNU debugger. |
2 | ||
e2882c85 | 3 | Copyright (C) 2013-2018 Free Software Foundation, Inc. |
d02ed0bb MM |
4 | |
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | #include "defs.h" | |
21 | #include "gdbcmd.h" | |
22 | #include "regcache.h" | |
23 | #include "gdbthread.h" | |
00431a78 | 24 | #include "inferior.h" |
d02ed0bb | 25 | #include "event-top.h" |
d02ed0bb MM |
26 | #include "completer.h" |
27 | #include "arch-utils.h" | |
28 | #include "gdbcore.h" | |
29 | #include "exec.h" | |
30 | #include "record.h" | |
31 | #include "record-full.h" | |
32 | #include "elf-bfd.h" | |
33 | #include "gcore.h" | |
34 | #include "event-loop.h" | |
35 | #include "inf-loop.h" | |
36 | #include "gdb_bfd.h" | |
76727919 | 37 | #include "observable.h" |
45741a9c | 38 | #include "infrun.h" |
bef155c3 | 39 | #include "common/gdb_unlinker.h" |
d7dcbefc | 40 | #include "common/byte-vector.h" |
d02ed0bb MM |
41 | |
42 | #include <signal.h> | |
43 | ||
44 | /* This module implements "target record-full", also known as "process | |
45 | record and replay". This target sits on top of a "normal" target | |
46 | (a target that "has execution"), and provides a record and replay | |
47 | functionality, including reverse debugging. | |
48 | ||
49 | Target record has two modes: recording, and replaying. | |
50 | ||
f6ac5f3d | 51 | In record mode, we intercept the resume and wait methods. |
d02ed0bb MM |
52 | Whenever gdb resumes the target, we run the target in single step |
53 | mode, and we build up an execution log in which, for each executed | |
54 | instruction, we record all changes in memory and register state. | |
55 | This is invisible to the user, to whom it just looks like an | |
56 | ordinary debugging session (except for performance degredation). | |
57 | ||
58 | In replay mode, instead of actually letting the inferior run as a | |
59 | process, we simulate its execution by playing back the recorded | |
60 | execution log. For each instruction in the log, we simulate the | |
61 | instruction's side effects by duplicating the changes that it would | |
62 | have made on memory and registers. */ | |
63 | ||
88d1aa9d | 64 | #define DEFAULT_RECORD_FULL_INSN_MAX_NUM 200000 |
d02ed0bb | 65 | |
88d1aa9d | 66 | #define RECORD_FULL_IS_REPLAY \ |
f6ac5f3d | 67 | (record_full_list->next || ::execution_direction == EXEC_REVERSE) |
d02ed0bb | 68 | |
88d1aa9d | 69 | #define RECORD_FULL_FILE_MAGIC netorder32(0x20091016) |
d02ed0bb MM |
70 | |
71 | /* These are the core structs of the process record functionality. | |
72 | ||
88d1aa9d MM |
73 | A record_full_entry is a record of the value change of a register |
74 | ("record_full_reg") or a part of memory ("record_full_mem"). And each | |
75 | instruction must have a struct record_full_entry ("record_full_end") | |
76 | that indicates that this is the last struct record_full_entry of this | |
d02ed0bb MM |
77 | instruction. |
78 | ||
88d1aa9d MM |
79 | Each struct record_full_entry is linked to "record_full_list" by "prev" |
80 | and "next" pointers. */ | |
d02ed0bb | 81 | |
88d1aa9d | 82 | struct record_full_mem_entry |
d02ed0bb MM |
83 | { |
84 | CORE_ADDR addr; | |
85 | int len; | |
86 | /* Set this flag if target memory for this entry | |
87 | can no longer be accessed. */ | |
88 | int mem_entry_not_accessible; | |
89 | union | |
90 | { | |
91 | gdb_byte *ptr; | |
92 | gdb_byte buf[sizeof (gdb_byte *)]; | |
93 | } u; | |
94 | }; | |
95 | ||
88d1aa9d | 96 | struct record_full_reg_entry |
d02ed0bb MM |
97 | { |
98 | unsigned short num; | |
99 | unsigned short len; | |
100 | union | |
101 | { | |
102 | gdb_byte *ptr; | |
103 | gdb_byte buf[2 * sizeof (gdb_byte *)]; | |
104 | } u; | |
105 | }; | |
106 | ||
88d1aa9d | 107 | struct record_full_end_entry |
d02ed0bb MM |
108 | { |
109 | enum gdb_signal sigval; | |
110 | ULONGEST insn_num; | |
111 | }; | |
112 | ||
88d1aa9d | 113 | enum record_full_type |
d02ed0bb | 114 | { |
88d1aa9d MM |
115 | record_full_end = 0, |
116 | record_full_reg, | |
117 | record_full_mem | |
d02ed0bb MM |
118 | }; |
119 | ||
120 | /* This is the data structure that makes up the execution log. | |
121 | ||
122 | The execution log consists of a single linked list of entries | |
88d1aa9d | 123 | of type "struct record_full_entry". It is doubly linked so that it |
d02ed0bb MM |
124 | can be traversed in either direction. |
125 | ||
126 | The start of the list is anchored by a struct called | |
88d1aa9d MM |
127 | "record_full_first". The pointer "record_full_list" either points |
128 | to the last entry that was added to the list (in record mode), or to | |
129 | the next entry in the list that will be executed (in replay mode). | |
d02ed0bb | 130 | |
88d1aa9d MM |
131 | Each list element (struct record_full_entry), in addition to next |
132 | and prev pointers, consists of a union of three entry types: mem, | |
133 | reg, and end. A field called "type" determines which entry type is | |
d02ed0bb MM |
134 | represented by a given list element. |
135 | ||
136 | Each instruction that is added to the execution log is represented | |
137 | by a variable number of list elements ('entries'). The instruction | |
138 | will have one "reg" entry for each register that is changed by | |
139 | executing the instruction (including the PC in every case). It | |
140 | will also have one "mem" entry for each memory change. Finally, | |
141 | each instruction will have an "end" entry that separates it from | |
142 | the changes associated with the next instruction. */ | |
143 | ||
88d1aa9d | 144 | struct record_full_entry |
d02ed0bb | 145 | { |
88d1aa9d MM |
146 | struct record_full_entry *prev; |
147 | struct record_full_entry *next; | |
148 | enum record_full_type type; | |
d02ed0bb MM |
149 | union |
150 | { | |
151 | /* reg */ | |
88d1aa9d | 152 | struct record_full_reg_entry reg; |
d02ed0bb | 153 | /* mem */ |
88d1aa9d | 154 | struct record_full_mem_entry mem; |
d02ed0bb | 155 | /* end */ |
88d1aa9d | 156 | struct record_full_end_entry end; |
d02ed0bb MM |
157 | } u; |
158 | }; | |
159 | ||
160 | /* If true, query if PREC cannot record memory | |
161 | change of next instruction. */ | |
25ea693b | 162 | int record_full_memory_query = 0; |
d02ed0bb | 163 | |
88d1aa9d | 164 | struct record_full_core_buf_entry |
d02ed0bb | 165 | { |
88d1aa9d | 166 | struct record_full_core_buf_entry *prev; |
d02ed0bb MM |
167 | struct target_section *p; |
168 | bfd_byte *buf; | |
169 | }; | |
170 | ||
171 | /* Record buf with core target. */ | |
c8ec2f33 | 172 | static detached_regcache *record_full_core_regbuf = NULL; |
88d1aa9d MM |
173 | static struct target_section *record_full_core_start; |
174 | static struct target_section *record_full_core_end; | |
175 | static struct record_full_core_buf_entry *record_full_core_buf_list = NULL; | |
d02ed0bb MM |
176 | |
177 | /* The following variables are used for managing the linked list that | |
178 | represents the execution log. | |
179 | ||
88d1aa9d MM |
180 | record_full_first is the anchor that holds down the beginning of |
181 | the list. | |
d02ed0bb | 182 | |
88d1aa9d | 183 | record_full_list serves two functions: |
d02ed0bb MM |
184 | 1) In record mode, it anchors the end of the list. |
185 | 2) In replay mode, it traverses the list and points to | |
186 | the next instruction that must be emulated. | |
187 | ||
88d1aa9d MM |
188 | record_full_arch_list_head and record_full_arch_list_tail are used |
189 | to manage a separate list, which is used to build up the change | |
190 | elements of the currently executing instruction during record mode. | |
191 | When this instruction has been completely annotated in the "arch | |
192 | list", it will be appended to the main execution log. */ | |
d02ed0bb | 193 | |
88d1aa9d MM |
194 | static struct record_full_entry record_full_first; |
195 | static struct record_full_entry *record_full_list = &record_full_first; | |
196 | static struct record_full_entry *record_full_arch_list_head = NULL; | |
197 | static struct record_full_entry *record_full_arch_list_tail = NULL; | |
d02ed0bb | 198 | |
88d1aa9d MM |
199 | /* 1 ask user. 0 auto delete the last struct record_full_entry. */ |
200 | static int record_full_stop_at_limit = 1; | |
d02ed0bb | 201 | /* Maximum allowed number of insns in execution log. */ |
88d1aa9d MM |
202 | static unsigned int record_full_insn_max_num |
203 | = DEFAULT_RECORD_FULL_INSN_MAX_NUM; | |
d02ed0bb | 204 | /* Actual count of insns presently in execution log. */ |
7ee70bf5 | 205 | static unsigned int record_full_insn_num = 0; |
d02ed0bb MM |
206 | /* Count of insns logged so far (may be larger |
207 | than count of insns presently in execution log). */ | |
88d1aa9d | 208 | static ULONGEST record_full_insn_count; |
d02ed0bb | 209 | |
d9f719f1 PA |
210 | static const char record_longname[] |
211 | = N_("Process record and replay target"); | |
212 | static const char record_doc[] | |
213 | = N_("Log program while executing and replay execution from log."); | |
214 | ||
f6ac5f3d PA |
215 | /* Base class implementing functionality common to both the |
216 | "record-full" and "record-core" targets. */ | |
217 | ||
218 | class record_full_base_target : public target_ops | |
219 | { | |
220 | public: | |
221 | record_full_base_target () | |
222 | { to_stratum = record_stratum; } | |
223 | ||
d9f719f1 | 224 | const target_info &info () const override = 0; |
f6ac5f3d | 225 | |
f6ac5f3d PA |
226 | void close () override; |
227 | void async (int) override; | |
228 | ptid_t wait (ptid_t, struct target_waitstatus *, int) override; | |
57810aa7 PA |
229 | bool stopped_by_watchpoint () override; |
230 | bool stopped_data_address (CORE_ADDR *) override; | |
f6ac5f3d | 231 | |
57810aa7 PA |
232 | bool stopped_by_sw_breakpoint () override; |
233 | bool supports_stopped_by_sw_breakpoint () override; | |
f6ac5f3d | 234 | |
57810aa7 PA |
235 | bool stopped_by_hw_breakpoint () override; |
236 | bool supports_stopped_by_hw_breakpoint () override; | |
f6ac5f3d | 237 | |
57810aa7 | 238 | bool can_execute_reverse () override; |
f6ac5f3d PA |
239 | |
240 | /* Add bookmark target methods. */ | |
241 | gdb_byte *get_bookmark (const char *, int) override; | |
242 | void goto_bookmark (const gdb_byte *, int) override; | |
243 | enum exec_direction_kind execution_direction () override; | |
244 | enum record_method record_method (ptid_t ptid) override; | |
245 | void info_record () override; | |
246 | void save_record (const char *filename) override; | |
247 | bool supports_delete_record () override; | |
248 | void delete_record () override; | |
57810aa7 PA |
249 | bool record_is_replaying (ptid_t ptid) override; |
250 | bool record_will_replay (ptid_t ptid, int dir) override; | |
f6ac5f3d PA |
251 | void record_stop_replaying () override; |
252 | void goto_record_begin () override; | |
253 | void goto_record_end () override; | |
254 | void goto_record (ULONGEST insn) override; | |
255 | }; | |
256 | ||
257 | /* The "record-full" target. */ | |
258 | ||
d9f719f1 PA |
259 | static const target_info record_full_target_info = { |
260 | "record-full", | |
261 | record_longname, | |
262 | record_doc, | |
263 | }; | |
264 | ||
f6ac5f3d PA |
265 | class record_full_target final : public record_full_base_target |
266 | { | |
267 | public: | |
d9f719f1 PA |
268 | const target_info &info () const override |
269 | { return record_full_target_info; } | |
f6ac5f3d PA |
270 | |
271 | void commit_resume () override; | |
272 | void resume (ptid_t, int, enum gdb_signal) override; | |
273 | void disconnect (const char *, int) override; | |
274 | void detach (inferior *, int) override; | |
275 | void mourn_inferior () override; | |
276 | void kill () override; | |
277 | void store_registers (struct regcache *, int) override; | |
278 | enum target_xfer_status xfer_partial (enum target_object object, | |
279 | const char *annex, | |
280 | gdb_byte *readbuf, | |
281 | const gdb_byte *writebuf, | |
282 | ULONGEST offset, ULONGEST len, | |
283 | ULONGEST *xfered_len) override; | |
284 | int insert_breakpoint (struct gdbarch *, | |
285 | struct bp_target_info *) override; | |
286 | int remove_breakpoint (struct gdbarch *, | |
287 | struct bp_target_info *, | |
288 | enum remove_bp_reason) override; | |
289 | }; | |
290 | ||
291 | /* The "record-core" target. */ | |
292 | ||
d9f719f1 PA |
293 | static const target_info record_full_core_target_info = { |
294 | "record-core", | |
295 | record_longname, | |
296 | record_doc, | |
297 | }; | |
298 | ||
f6ac5f3d PA |
299 | class record_full_core_target final : public record_full_base_target |
300 | { | |
301 | public: | |
d9f719f1 PA |
302 | const target_info &info () const override |
303 | { return record_full_core_target_info; } | |
f6ac5f3d PA |
304 | |
305 | void resume (ptid_t, int, enum gdb_signal) override; | |
306 | void disconnect (const char *, int) override; | |
307 | void kill () override; | |
308 | void fetch_registers (struct regcache *regcache, int regno) override; | |
309 | void prepare_to_store (struct regcache *regcache) override; | |
310 | void store_registers (struct regcache *, int) override; | |
311 | enum target_xfer_status xfer_partial (enum target_object object, | |
312 | const char *annex, | |
313 | gdb_byte *readbuf, | |
314 | const gdb_byte *writebuf, | |
315 | ULONGEST offset, ULONGEST len, | |
316 | ULONGEST *xfered_len) override; | |
317 | int insert_breakpoint (struct gdbarch *, | |
318 | struct bp_target_info *) override; | |
319 | int remove_breakpoint (struct gdbarch *, | |
320 | struct bp_target_info *, | |
321 | enum remove_bp_reason) override; | |
322 | ||
57810aa7 | 323 | bool has_execution (ptid_t) override; |
f6ac5f3d PA |
324 | }; |
325 | ||
326 | static record_full_target record_full_ops; | |
327 | static record_full_core_target record_full_core_ops; | |
328 | ||
329 | void | |
330 | record_full_target::detach (inferior *inf, int from_tty) | |
331 | { | |
332 | record_detach (this, inf, from_tty); | |
333 | } | |
334 | ||
335 | void | |
336 | record_full_target::disconnect (const char *args, int from_tty) | |
337 | { | |
338 | record_disconnect (this, args, from_tty); | |
339 | } | |
340 | ||
341 | void | |
342 | record_full_core_target::disconnect (const char *args, int from_tty) | |
343 | { | |
344 | record_disconnect (this, args, from_tty); | |
345 | } | |
346 | ||
347 | void | |
348 | record_full_target::mourn_inferior () | |
349 | { | |
350 | record_mourn_inferior (this); | |
351 | } | |
352 | ||
353 | void | |
354 | record_full_target::kill () | |
355 | { | |
356 | record_kill (this); | |
357 | } | |
d02ed0bb | 358 | |
8213266a PA |
359 | /* See record-full.h. */ |
360 | ||
361 | int | |
362 | record_full_is_used (void) | |
363 | { | |
364 | struct target_ops *t; | |
365 | ||
366 | t = find_record_target (); | |
367 | return (t == &record_full_ops | |
368 | || t == &record_full_core_ops); | |
369 | } | |
370 | ||
371 | ||
d02ed0bb MM |
372 | /* Command lists for "set/show record full". */ |
373 | static struct cmd_list_element *set_record_full_cmdlist; | |
374 | static struct cmd_list_element *show_record_full_cmdlist; | |
375 | ||
376 | /* Command list for "record full". */ | |
377 | static struct cmd_list_element *record_full_cmdlist; | |
378 | ||
88d1aa9d MM |
379 | static void record_full_goto_insn (struct record_full_entry *entry, |
380 | enum exec_direction_kind dir); | |
88d1aa9d MM |
381 | |
382 | /* Alloc and free functions for record_full_reg, record_full_mem, and | |
383 | record_full_end entries. */ | |
384 | ||
385 | /* Alloc a record_full_reg record entry. */ | |
386 | ||
387 | static inline struct record_full_entry * | |
388 | record_full_reg_alloc (struct regcache *regcache, int regnum) | |
389 | { | |
390 | struct record_full_entry *rec; | |
ac7936df | 391 | struct gdbarch *gdbarch = regcache->arch (); |
d02ed0bb | 392 | |
8d749320 | 393 | rec = XCNEW (struct record_full_entry); |
88d1aa9d | 394 | rec->type = record_full_reg; |
d02ed0bb MM |
395 | rec->u.reg.num = regnum; |
396 | rec->u.reg.len = register_size (gdbarch, regnum); | |
397 | if (rec->u.reg.len > sizeof (rec->u.reg.u.buf)) | |
398 | rec->u.reg.u.ptr = (gdb_byte *) xmalloc (rec->u.reg.len); | |
399 | ||
400 | return rec; | |
401 | } | |
402 | ||
88d1aa9d | 403 | /* Free a record_full_reg record entry. */ |
d02ed0bb MM |
404 | |
405 | static inline void | |
88d1aa9d | 406 | record_full_reg_release (struct record_full_entry *rec) |
d02ed0bb | 407 | { |
88d1aa9d | 408 | gdb_assert (rec->type == record_full_reg); |
d02ed0bb MM |
409 | if (rec->u.reg.len > sizeof (rec->u.reg.u.buf)) |
410 | xfree (rec->u.reg.u.ptr); | |
411 | xfree (rec); | |
412 | } | |
413 | ||
88d1aa9d | 414 | /* Alloc a record_full_mem record entry. */ |
d02ed0bb | 415 | |
88d1aa9d MM |
416 | static inline struct record_full_entry * |
417 | record_full_mem_alloc (CORE_ADDR addr, int len) | |
d02ed0bb | 418 | { |
88d1aa9d | 419 | struct record_full_entry *rec; |
d02ed0bb | 420 | |
8d749320 | 421 | rec = XCNEW (struct record_full_entry); |
88d1aa9d | 422 | rec->type = record_full_mem; |
d02ed0bb MM |
423 | rec->u.mem.addr = addr; |
424 | rec->u.mem.len = len; | |
425 | if (rec->u.mem.len > sizeof (rec->u.mem.u.buf)) | |
426 | rec->u.mem.u.ptr = (gdb_byte *) xmalloc (len); | |
427 | ||
428 | return rec; | |
429 | } | |
430 | ||
88d1aa9d | 431 | /* Free a record_full_mem record entry. */ |
d02ed0bb MM |
432 | |
433 | static inline void | |
88d1aa9d | 434 | record_full_mem_release (struct record_full_entry *rec) |
d02ed0bb | 435 | { |
88d1aa9d | 436 | gdb_assert (rec->type == record_full_mem); |
d02ed0bb MM |
437 | if (rec->u.mem.len > sizeof (rec->u.mem.u.buf)) |
438 | xfree (rec->u.mem.u.ptr); | |
439 | xfree (rec); | |
440 | } | |
441 | ||
88d1aa9d | 442 | /* Alloc a record_full_end record entry. */ |
d02ed0bb | 443 | |
88d1aa9d MM |
444 | static inline struct record_full_entry * |
445 | record_full_end_alloc (void) | |
d02ed0bb | 446 | { |
88d1aa9d | 447 | struct record_full_entry *rec; |
d02ed0bb | 448 | |
8d749320 | 449 | rec = XCNEW (struct record_full_entry); |
88d1aa9d | 450 | rec->type = record_full_end; |
d02ed0bb MM |
451 | |
452 | return rec; | |
453 | } | |
454 | ||
88d1aa9d | 455 | /* Free a record_full_end record entry. */ |
d02ed0bb MM |
456 | |
457 | static inline void | |
88d1aa9d | 458 | record_full_end_release (struct record_full_entry *rec) |
d02ed0bb MM |
459 | { |
460 | xfree (rec); | |
461 | } | |
462 | ||
463 | /* Free one record entry, any type. | |
464 | Return entry->type, in case caller wants to know. */ | |
465 | ||
88d1aa9d MM |
466 | static inline enum record_full_type |
467 | record_full_entry_release (struct record_full_entry *rec) | |
d02ed0bb | 468 | { |
88d1aa9d | 469 | enum record_full_type type = rec->type; |
d02ed0bb MM |
470 | |
471 | switch (type) { | |
88d1aa9d MM |
472 | case record_full_reg: |
473 | record_full_reg_release (rec); | |
d02ed0bb | 474 | break; |
88d1aa9d MM |
475 | case record_full_mem: |
476 | record_full_mem_release (rec); | |
d02ed0bb | 477 | break; |
88d1aa9d MM |
478 | case record_full_end: |
479 | record_full_end_release (rec); | |
d02ed0bb MM |
480 | break; |
481 | } | |
482 | return type; | |
483 | } | |
484 | ||
485 | /* Free all record entries in list pointed to by REC. */ | |
486 | ||
487 | static void | |
88d1aa9d | 488 | record_full_list_release (struct record_full_entry *rec) |
d02ed0bb MM |
489 | { |
490 | if (!rec) | |
491 | return; | |
492 | ||
493 | while (rec->next) | |
494 | rec = rec->next; | |
495 | ||
496 | while (rec->prev) | |
497 | { | |
498 | rec = rec->prev; | |
88d1aa9d | 499 | record_full_entry_release (rec->next); |
d02ed0bb MM |
500 | } |
501 | ||
88d1aa9d | 502 | if (rec == &record_full_first) |
d02ed0bb | 503 | { |
88d1aa9d MM |
504 | record_full_insn_num = 0; |
505 | record_full_first.next = NULL; | |
d02ed0bb MM |
506 | } |
507 | else | |
88d1aa9d | 508 | record_full_entry_release (rec); |
d02ed0bb MM |
509 | } |
510 | ||
511 | /* Free all record entries forward of the given list position. */ | |
512 | ||
513 | static void | |
88d1aa9d | 514 | record_full_list_release_following (struct record_full_entry *rec) |
d02ed0bb | 515 | { |
88d1aa9d | 516 | struct record_full_entry *tmp = rec->next; |
d02ed0bb MM |
517 | |
518 | rec->next = NULL; | |
519 | while (tmp) | |
520 | { | |
521 | rec = tmp->next; | |
88d1aa9d | 522 | if (record_full_entry_release (tmp) == record_full_end) |
d02ed0bb | 523 | { |
88d1aa9d MM |
524 | record_full_insn_num--; |
525 | record_full_insn_count--; | |
d02ed0bb MM |
526 | } |
527 | tmp = rec; | |
528 | } | |
529 | } | |
530 | ||
531 | /* Delete the first instruction from the beginning of the log, to make | |
532 | room for adding a new instruction at the end of the log. | |
533 | ||
88d1aa9d | 534 | Note -- this function does not modify record_full_insn_num. */ |
d02ed0bb MM |
535 | |
536 | static void | |
88d1aa9d | 537 | record_full_list_release_first (void) |
d02ed0bb | 538 | { |
88d1aa9d | 539 | struct record_full_entry *tmp; |
d02ed0bb | 540 | |
88d1aa9d | 541 | if (!record_full_first.next) |
d02ed0bb MM |
542 | return; |
543 | ||
88d1aa9d | 544 | /* Loop until a record_full_end. */ |
d02ed0bb MM |
545 | while (1) |
546 | { | |
88d1aa9d MM |
547 | /* Cut record_full_first.next out of the linked list. */ |
548 | tmp = record_full_first.next; | |
549 | record_full_first.next = tmp->next; | |
550 | tmp->next->prev = &record_full_first; | |
d02ed0bb MM |
551 | |
552 | /* tmp is now isolated, and can be deleted. */ | |
88d1aa9d MM |
553 | if (record_full_entry_release (tmp) == record_full_end) |
554 | break; /* End loop at first record_full_end. */ | |
d02ed0bb | 555 | |
88d1aa9d | 556 | if (!record_full_first.next) |
d02ed0bb | 557 | { |
88d1aa9d | 558 | gdb_assert (record_full_insn_num == 1); |
d02ed0bb MM |
559 | break; /* End loop when list is empty. */ |
560 | } | |
561 | } | |
562 | } | |
563 | ||
88d1aa9d | 564 | /* Add a struct record_full_entry to record_full_arch_list. */ |
d02ed0bb MM |
565 | |
566 | static void | |
88d1aa9d | 567 | record_full_arch_list_add (struct record_full_entry *rec) |
d02ed0bb MM |
568 | { |
569 | if (record_debug > 1) | |
570 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 571 | "Process record: record_full_arch_list_add %s.\n", |
d02ed0bb MM |
572 | host_address_to_string (rec)); |
573 | ||
88d1aa9d | 574 | if (record_full_arch_list_tail) |
d02ed0bb | 575 | { |
88d1aa9d MM |
576 | record_full_arch_list_tail->next = rec; |
577 | rec->prev = record_full_arch_list_tail; | |
578 | record_full_arch_list_tail = rec; | |
d02ed0bb MM |
579 | } |
580 | else | |
581 | { | |
88d1aa9d MM |
582 | record_full_arch_list_head = rec; |
583 | record_full_arch_list_tail = rec; | |
d02ed0bb MM |
584 | } |
585 | } | |
586 | ||
587 | /* Return the value storage location of a record entry. */ | |
588 | static inline gdb_byte * | |
88d1aa9d | 589 | record_full_get_loc (struct record_full_entry *rec) |
d02ed0bb MM |
590 | { |
591 | switch (rec->type) { | |
88d1aa9d | 592 | case record_full_mem: |
d02ed0bb MM |
593 | if (rec->u.mem.len > sizeof (rec->u.mem.u.buf)) |
594 | return rec->u.mem.u.ptr; | |
595 | else | |
596 | return rec->u.mem.u.buf; | |
88d1aa9d | 597 | case record_full_reg: |
d02ed0bb MM |
598 | if (rec->u.reg.len > sizeof (rec->u.reg.u.buf)) |
599 | return rec->u.reg.u.ptr; | |
600 | else | |
601 | return rec->u.reg.u.buf; | |
88d1aa9d | 602 | case record_full_end: |
d02ed0bb | 603 | default: |
88d1aa9d | 604 | gdb_assert_not_reached ("unexpected record_full_entry type"); |
d02ed0bb MM |
605 | return NULL; |
606 | } | |
607 | } | |
608 | ||
88d1aa9d | 609 | /* Record the value of a register NUM to record_full_arch_list. */ |
d02ed0bb MM |
610 | |
611 | int | |
25ea693b | 612 | record_full_arch_list_add_reg (struct regcache *regcache, int regnum) |
d02ed0bb | 613 | { |
88d1aa9d | 614 | struct record_full_entry *rec; |
d02ed0bb MM |
615 | |
616 | if (record_debug > 1) | |
617 | fprintf_unfiltered (gdb_stdlog, | |
618 | "Process record: add register num = %d to " | |
619 | "record list.\n", | |
620 | regnum); | |
621 | ||
88d1aa9d | 622 | rec = record_full_reg_alloc (regcache, regnum); |
d02ed0bb | 623 | |
0b883586 | 624 | regcache->raw_read (regnum, record_full_get_loc (rec)); |
d02ed0bb | 625 | |
88d1aa9d | 626 | record_full_arch_list_add (rec); |
d02ed0bb MM |
627 | |
628 | return 0; | |
629 | } | |
630 | ||
631 | /* Record the value of a region of memory whose address is ADDR and | |
88d1aa9d | 632 | length is LEN to record_full_arch_list. */ |
d02ed0bb MM |
633 | |
634 | int | |
25ea693b | 635 | record_full_arch_list_add_mem (CORE_ADDR addr, int len) |
d02ed0bb | 636 | { |
88d1aa9d | 637 | struct record_full_entry *rec; |
d02ed0bb MM |
638 | |
639 | if (record_debug > 1) | |
640 | fprintf_unfiltered (gdb_stdlog, | |
641 | "Process record: add mem addr = %s len = %d to " | |
642 | "record list.\n", | |
643 | paddress (target_gdbarch (), addr), len); | |
644 | ||
645 | if (!addr) /* FIXME: Why? Some arch must permit it... */ | |
646 | return 0; | |
647 | ||
88d1aa9d | 648 | rec = record_full_mem_alloc (addr, len); |
d02ed0bb | 649 | |
88d1aa9d MM |
650 | if (record_read_memory (target_gdbarch (), addr, |
651 | record_full_get_loc (rec), len)) | |
d02ed0bb | 652 | { |
88d1aa9d | 653 | record_full_mem_release (rec); |
d02ed0bb MM |
654 | return -1; |
655 | } | |
656 | ||
88d1aa9d | 657 | record_full_arch_list_add (rec); |
d02ed0bb MM |
658 | |
659 | return 0; | |
660 | } | |
661 | ||
88d1aa9d MM |
662 | /* Add a record_full_end type struct record_full_entry to |
663 | record_full_arch_list. */ | |
d02ed0bb MM |
664 | |
665 | int | |
25ea693b | 666 | record_full_arch_list_add_end (void) |
d02ed0bb | 667 | { |
88d1aa9d | 668 | struct record_full_entry *rec; |
d02ed0bb MM |
669 | |
670 | if (record_debug > 1) | |
671 | fprintf_unfiltered (gdb_stdlog, | |
672 | "Process record: add end to arch list.\n"); | |
673 | ||
88d1aa9d | 674 | rec = record_full_end_alloc (); |
d02ed0bb | 675 | rec->u.end.sigval = GDB_SIGNAL_0; |
88d1aa9d | 676 | rec->u.end.insn_num = ++record_full_insn_count; |
d02ed0bb | 677 | |
88d1aa9d | 678 | record_full_arch_list_add (rec); |
d02ed0bb MM |
679 | |
680 | return 0; | |
681 | } | |
682 | ||
683 | static void | |
651ce16a | 684 | record_full_check_insn_num (void) |
d02ed0bb | 685 | { |
7ee70bf5 | 686 | if (record_full_insn_num == record_full_insn_max_num) |
d02ed0bb | 687 | { |
7ee70bf5 PA |
688 | /* Ask user what to do. */ |
689 | if (record_full_stop_at_limit) | |
d02ed0bb | 690 | { |
651ce16a | 691 | if (!yquery (_("Do you want to auto delete previous execution " |
7ee70bf5 | 692 | "log entries when record/replay buffer becomes " |
651ce16a | 693 | "full (record full stop-at-limit)?"))) |
7ee70bf5 | 694 | error (_("Process record: stopped by user.")); |
651ce16a | 695 | record_full_stop_at_limit = 0; |
d02ed0bb MM |
696 | } |
697 | } | |
698 | } | |
699 | ||
d02ed0bb MM |
700 | /* Before inferior step (when GDB record the running message, inferior |
701 | only can step), GDB will call this function to record the values to | |
88d1aa9d | 702 | record_full_list. This function will call gdbarch_process_record to |
d02ed0bb | 703 | record the running message of inferior and set them to |
88d1aa9d | 704 | record_full_arch_list, and add it to record_full_list. */ |
d02ed0bb | 705 | |
bf469271 | 706 | static void |
88d1aa9d | 707 | record_full_message (struct regcache *regcache, enum gdb_signal signal) |
d02ed0bb MM |
708 | { |
709 | int ret; | |
ac7936df | 710 | struct gdbarch *gdbarch = regcache->arch (); |
d02ed0bb | 711 | |
1ddbba9d TT |
712 | TRY |
713 | { | |
714 | record_full_arch_list_head = NULL; | |
715 | record_full_arch_list_tail = NULL; | |
d02ed0bb | 716 | |
1ddbba9d TT |
717 | /* Check record_full_insn_num. */ |
718 | record_full_check_insn_num (); | |
719 | ||
720 | /* If gdb sends a signal value to target_resume, | |
721 | save it in the 'end' field of the previous instruction. | |
d02ed0bb | 722 | |
1ddbba9d TT |
723 | Maybe process record should record what really happened, |
724 | rather than what gdb pretends has happened. | |
d02ed0bb | 725 | |
1ddbba9d TT |
726 | So if Linux delivered the signal to the child process during |
727 | the record mode, we will record it and deliver it again in | |
728 | the replay mode. | |
d02ed0bb | 729 | |
1ddbba9d TT |
730 | If user says "ignore this signal" during the record mode, then |
731 | it will be ignored again during the replay mode (no matter if | |
732 | the user says something different, like "deliver this signal" | |
733 | during the replay mode). | |
d02ed0bb | 734 | |
1ddbba9d TT |
735 | User should understand that nothing he does during the replay |
736 | mode will change the behavior of the child. If he tries, | |
737 | then that is a user error. | |
d02ed0bb | 738 | |
1ddbba9d TT |
739 | But we should still deliver the signal to gdb during the replay, |
740 | if we delivered it during the recording. Therefore we should | |
741 | record the signal during record_full_wait, not | |
742 | record_full_resume. */ | |
743 | if (record_full_list != &record_full_first) /* FIXME better way | |
744 | to check */ | |
745 | { | |
746 | gdb_assert (record_full_list->type == record_full_end); | |
747 | record_full_list->u.end.sigval = signal; | |
748 | } | |
d02ed0bb | 749 | |
1ddbba9d TT |
750 | if (signal == GDB_SIGNAL_0 |
751 | || !gdbarch_process_record_signal_p (gdbarch)) | |
752 | ret = gdbarch_process_record (gdbarch, | |
753 | regcache, | |
754 | regcache_read_pc (regcache)); | |
755 | else | |
756 | ret = gdbarch_process_record_signal (gdbarch, | |
757 | regcache, | |
758 | signal); | |
759 | ||
760 | if (ret > 0) | |
761 | error (_("Process record: inferior program stopped.")); | |
762 | if (ret < 0) | |
763 | error (_("Process record: failed to record execution log.")); | |
764 | } | |
765 | CATCH (ex, RETURN_MASK_ALL) | |
d02ed0bb | 766 | { |
1ddbba9d TT |
767 | record_full_list_release (record_full_arch_list_tail); |
768 | throw_exception (ex); | |
d02ed0bb | 769 | } |
1ddbba9d | 770 | END_CATCH |
d02ed0bb | 771 | |
88d1aa9d MM |
772 | record_full_list->next = record_full_arch_list_head; |
773 | record_full_arch_list_head->prev = record_full_list; | |
774 | record_full_list = record_full_arch_list_tail; | |
d02ed0bb | 775 | |
7ee70bf5 | 776 | if (record_full_insn_num == record_full_insn_max_num) |
88d1aa9d | 777 | record_full_list_release_first (); |
d02ed0bb | 778 | else |
88d1aa9d | 779 | record_full_insn_num++; |
d02ed0bb MM |
780 | } |
781 | ||
bf469271 | 782 | static bool |
88d1aa9d MM |
783 | record_full_message_wrapper_safe (struct regcache *regcache, |
784 | enum gdb_signal signal) | |
d02ed0bb | 785 | { |
bf469271 PA |
786 | TRY |
787 | { | |
788 | record_full_message (regcache, signal); | |
789 | } | |
790 | CATCH (ex, RETURN_MASK_ALL) | |
791 | { | |
792 | exception_print (gdb_stderr, ex); | |
793 | return false; | |
794 | } | |
795 | END_CATCH | |
d02ed0bb | 796 | |
bf469271 | 797 | return true; |
d02ed0bb MM |
798 | } |
799 | ||
88d1aa9d | 800 | /* Set to 1 if record_full_store_registers and record_full_xfer_partial |
d02ed0bb MM |
801 | doesn't need record. */ |
802 | ||
88d1aa9d | 803 | static int record_full_gdb_operation_disable = 0; |
d02ed0bb | 804 | |
07036511 | 805 | scoped_restore_tmpl<int> |
25ea693b | 806 | record_full_gdb_operation_disable_set (void) |
d02ed0bb | 807 | { |
07036511 | 808 | return make_scoped_restore (&record_full_gdb_operation_disable, 1); |
d02ed0bb MM |
809 | } |
810 | ||
811 | /* Flag set to TRUE for target_stopped_by_watchpoint. */ | |
9e8915c6 PA |
812 | static enum target_stop_reason record_full_stop_reason |
813 | = TARGET_STOPPED_BY_NO_REASON; | |
d02ed0bb MM |
814 | |
815 | /* Execute one instruction from the record log. Each instruction in | |
816 | the log will be represented by an arbitrary sequence of register | |
817 | entries and memory entries, followed by an 'end' entry. */ | |
818 | ||
819 | static inline void | |
88d1aa9d MM |
820 | record_full_exec_insn (struct regcache *regcache, |
821 | struct gdbarch *gdbarch, | |
822 | struct record_full_entry *entry) | |
d02ed0bb MM |
823 | { |
824 | switch (entry->type) | |
825 | { | |
88d1aa9d | 826 | case record_full_reg: /* reg */ |
d02ed0bb | 827 | { |
d7dcbefc | 828 | gdb::byte_vector reg (entry->u.reg.len); |
d02ed0bb MM |
829 | |
830 | if (record_debug > 1) | |
831 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 832 | "Process record: record_full_reg %s to " |
d02ed0bb MM |
833 | "inferior num = %d.\n", |
834 | host_address_to_string (entry), | |
835 | entry->u.reg.num); | |
836 | ||
dca08e1f | 837 | regcache->cooked_read (entry->u.reg.num, reg.data ()); |
b66f5587 | 838 | regcache->cooked_write (entry->u.reg.num, record_full_get_loc (entry)); |
d7dcbefc | 839 | memcpy (record_full_get_loc (entry), reg.data (), entry->u.reg.len); |
d02ed0bb MM |
840 | } |
841 | break; | |
842 | ||
88d1aa9d | 843 | case record_full_mem: /* mem */ |
d02ed0bb MM |
844 | { |
845 | /* Nothing to do if the entry is flagged not_accessible. */ | |
846 | if (!entry->u.mem.mem_entry_not_accessible) | |
847 | { | |
a2b2bc12 | 848 | gdb::byte_vector mem (entry->u.mem.len); |
d02ed0bb MM |
849 | |
850 | if (record_debug > 1) | |
851 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 852 | "Process record: record_full_mem %s to " |
d02ed0bb MM |
853 | "inferior addr = %s len = %d.\n", |
854 | host_address_to_string (entry), | |
855 | paddress (gdbarch, entry->u.mem.addr), | |
856 | entry->u.mem.len); | |
857 | ||
858 | if (record_read_memory (gdbarch, | |
a2b2bc12 TT |
859 | entry->u.mem.addr, mem.data (), |
860 | entry->u.mem.len)) | |
d02ed0bb MM |
861 | entry->u.mem.mem_entry_not_accessible = 1; |
862 | else | |
863 | { | |
864 | if (target_write_memory (entry->u.mem.addr, | |
88d1aa9d | 865 | record_full_get_loc (entry), |
d02ed0bb MM |
866 | entry->u.mem.len)) |
867 | { | |
868 | entry->u.mem.mem_entry_not_accessible = 1; | |
869 | if (record_debug) | |
870 | warning (_("Process record: error writing memory at " | |
871 | "addr = %s len = %d."), | |
872 | paddress (gdbarch, entry->u.mem.addr), | |
873 | entry->u.mem.len); | |
874 | } | |
875 | else | |
876 | { | |
a2b2bc12 | 877 | memcpy (record_full_get_loc (entry), mem.data (), |
88d1aa9d | 878 | entry->u.mem.len); |
d02ed0bb MM |
879 | |
880 | /* We've changed memory --- check if a hardware | |
881 | watchpoint should trap. Note that this | |
882 | presently assumes the target beneath supports | |
883 | continuable watchpoints. On non-continuable | |
884 | watchpoints target, we'll want to check this | |
885 | _before_ actually doing the memory change, and | |
886 | not doing the change at all if the watchpoint | |
887 | traps. */ | |
888 | if (hardware_watchpoint_inserted_in_range | |
a01bda52 | 889 | (regcache->aspace (), |
d02ed0bb | 890 | entry->u.mem.addr, entry->u.mem.len)) |
9e8915c6 | 891 | record_full_stop_reason = TARGET_STOPPED_BY_WATCHPOINT; |
d02ed0bb MM |
892 | } |
893 | } | |
894 | } | |
895 | } | |
896 | break; | |
897 | } | |
898 | } | |
899 | ||
88d1aa9d | 900 | static void record_full_restore (void); |
d02ed0bb MM |
901 | |
902 | /* Asynchronous signal handle registered as event loop source for when | |
903 | we have pending events ready to be passed to the core. */ | |
904 | ||
88d1aa9d | 905 | static struct async_event_handler *record_full_async_inferior_event_token; |
d02ed0bb MM |
906 | |
907 | static void | |
88d1aa9d | 908 | record_full_async_inferior_event_handler (gdb_client_data data) |
d02ed0bb MM |
909 | { |
910 | inferior_event_handler (INF_REG_EVENT, NULL); | |
911 | } | |
912 | ||
d9f719f1 | 913 | /* Open the process record target for 'core' files. */ |
d02ed0bb MM |
914 | |
915 | static void | |
014f9477 | 916 | record_full_core_open_1 (const char *name, int from_tty) |
d02ed0bb MM |
917 | { |
918 | struct regcache *regcache = get_current_regcache (); | |
ac7936df | 919 | int regnum = gdbarch_num_regs (regcache->arch ()); |
d02ed0bb MM |
920 | int i; |
921 | ||
88d1aa9d | 922 | /* Get record_full_core_regbuf. */ |
d02ed0bb | 923 | target_fetch_registers (regcache, -1); |
c8ec2f33 YQ |
924 | record_full_core_regbuf = new detached_regcache (regcache->arch (), false); |
925 | ||
d02ed0bb | 926 | for (i = 0; i < regnum; i ++) |
c8ec2f33 | 927 | record_full_core_regbuf->raw_supply (i, *regcache); |
d02ed0bb | 928 | |
88d1aa9d MM |
929 | /* Get record_full_core_start and record_full_core_end. */ |
930 | if (build_section_table (core_bfd, &record_full_core_start, | |
931 | &record_full_core_end)) | |
d02ed0bb | 932 | { |
c8ec2f33 | 933 | delete record_full_core_regbuf; |
88d1aa9d | 934 | record_full_core_regbuf = NULL; |
d02ed0bb MM |
935 | error (_("\"%s\": Can't find sections: %s"), |
936 | bfd_get_filename (core_bfd), bfd_errmsg (bfd_get_error ())); | |
937 | } | |
938 | ||
88d1aa9d MM |
939 | push_target (&record_full_core_ops); |
940 | record_full_restore (); | |
d02ed0bb MM |
941 | } |
942 | ||
d9f719f1 | 943 | /* Open the process record target for 'live' processes. */ |
d02ed0bb MM |
944 | |
945 | static void | |
014f9477 | 946 | record_full_open_1 (const char *name, int from_tty) |
d02ed0bb MM |
947 | { |
948 | if (record_debug) | |
0a0640e3 | 949 | fprintf_unfiltered (gdb_stdlog, "Process record: record_full_open_1\n"); |
d02ed0bb MM |
950 | |
951 | /* check exec */ | |
952 | if (!target_has_execution) | |
953 | error (_("Process record: the program is not being run.")); | |
954 | if (non_stop) | |
955 | error (_("Process record target can't debug inferior in non-stop mode " | |
956 | "(non-stop).")); | |
957 | ||
958 | if (!gdbarch_process_record_p (target_gdbarch ())) | |
959 | error (_("Process record: the current architecture doesn't support " | |
960 | "record function.")); | |
961 | ||
88d1aa9d | 962 | push_target (&record_full_ops); |
d02ed0bb MM |
963 | } |
964 | ||
88d1aa9d | 965 | static void record_full_init_record_breakpoints (void); |
d02ed0bb | 966 | |
d9f719f1 | 967 | /* Open the process record target. */ |
d02ed0bb | 968 | |
d9f719f1 PA |
969 | static void |
970 | record_full_open (const char *name, int from_tty) | |
d02ed0bb | 971 | { |
d02ed0bb | 972 | if (record_debug) |
88d1aa9d | 973 | fprintf_unfiltered (gdb_stdlog, "Process record: record_full_open\n"); |
d02ed0bb | 974 | |
8213266a | 975 | record_preopen (); |
d02ed0bb | 976 | |
d02ed0bb | 977 | /* Reset */ |
88d1aa9d MM |
978 | record_full_insn_num = 0; |
979 | record_full_insn_count = 0; | |
980 | record_full_list = &record_full_first; | |
981 | record_full_list->next = NULL; | |
d02ed0bb | 982 | |
d02ed0bb | 983 | if (core_bfd) |
88d1aa9d | 984 | record_full_core_open_1 (name, from_tty); |
d02ed0bb | 985 | else |
88d1aa9d | 986 | record_full_open_1 (name, from_tty); |
d02ed0bb MM |
987 | |
988 | /* Register extra event sources in the event loop. */ | |
88d1aa9d MM |
989 | record_full_async_inferior_event_token |
990 | = create_async_event_handler (record_full_async_inferior_event_handler, | |
d02ed0bb MM |
991 | NULL); |
992 | ||
88d1aa9d | 993 | record_full_init_record_breakpoints (); |
d02ed0bb | 994 | |
76727919 | 995 | gdb::observers::record_changed.notify (current_inferior (), 1, "full", NULL); |
d02ed0bb MM |
996 | } |
997 | ||
f6ac5f3d | 998 | /* "close" target method. Close the process record target. */ |
d02ed0bb | 999 | |
f6ac5f3d PA |
1000 | void |
1001 | record_full_base_target::close () | |
d02ed0bb | 1002 | { |
88d1aa9d | 1003 | struct record_full_core_buf_entry *entry; |
d02ed0bb MM |
1004 | |
1005 | if (record_debug) | |
88d1aa9d | 1006 | fprintf_unfiltered (gdb_stdlog, "Process record: record_full_close\n"); |
d02ed0bb | 1007 | |
88d1aa9d | 1008 | record_full_list_release (record_full_list); |
d02ed0bb | 1009 | |
88d1aa9d MM |
1010 | /* Release record_full_core_regbuf. */ |
1011 | if (record_full_core_regbuf) | |
d02ed0bb | 1012 | { |
c8ec2f33 | 1013 | delete record_full_core_regbuf; |
88d1aa9d | 1014 | record_full_core_regbuf = NULL; |
d02ed0bb MM |
1015 | } |
1016 | ||
88d1aa9d MM |
1017 | /* Release record_full_core_buf_list. */ |
1018 | if (record_full_core_buf_list) | |
d02ed0bb | 1019 | { |
88d1aa9d MM |
1020 | for (entry = record_full_core_buf_list->prev; entry; |
1021 | entry = entry->prev) | |
d02ed0bb | 1022 | { |
88d1aa9d MM |
1023 | xfree (record_full_core_buf_list); |
1024 | record_full_core_buf_list = entry; | |
d02ed0bb | 1025 | } |
88d1aa9d | 1026 | record_full_core_buf_list = NULL; |
d02ed0bb MM |
1027 | } |
1028 | ||
88d1aa9d MM |
1029 | if (record_full_async_inferior_event_token) |
1030 | delete_async_event_handler (&record_full_async_inferior_event_token); | |
d02ed0bb MM |
1031 | } |
1032 | ||
f6ac5f3d | 1033 | /* "async" target method. */ |
b7d2e916 | 1034 | |
f6ac5f3d PA |
1035 | void |
1036 | record_full_base_target::async (int enable) | |
b7d2e916 | 1037 | { |
6a3753b3 | 1038 | if (enable) |
b7d2e916 PA |
1039 | mark_async_event_handler (record_full_async_inferior_event_token); |
1040 | else | |
1041 | clear_async_event_handler (record_full_async_inferior_event_token); | |
1042 | ||
b6a8c27b | 1043 | beneath ()->async (enable); |
b7d2e916 PA |
1044 | } |
1045 | ||
88d1aa9d | 1046 | static int record_full_resume_step = 0; |
d02ed0bb | 1047 | |
88d1aa9d MM |
1048 | /* True if we've been resumed, and so each record_full_wait call should |
1049 | advance execution. If this is false, record_full_wait will return a | |
d02ed0bb | 1050 | TARGET_WAITKIND_IGNORE. */ |
88d1aa9d | 1051 | static int record_full_resumed = 0; |
d02ed0bb MM |
1052 | |
1053 | /* The execution direction of the last resume we got. This is | |
1054 | necessary for async mode. Vis (order is not strictly accurate): | |
1055 | ||
1056 | 1. user has the global execution direction set to forward | |
1057 | 2. user does a reverse-step command | |
88d1aa9d | 1058 | 3. record_full_resume is called with global execution direction |
d02ed0bb MM |
1059 | temporarily switched to reverse |
1060 | 4. GDB's execution direction is reverted back to forward | |
1061 | 5. target record notifies event loop there's an event to handle | |
1062 | 6. infrun asks the target which direction was it going, and switches | |
1063 | the global execution direction accordingly (to reverse) | |
1064 | 7. infrun polls an event out of the record target, and handles it | |
1065 | 8. GDB goes back to the event loop, and goto #4. | |
1066 | */ | |
88d1aa9d | 1067 | static enum exec_direction_kind record_full_execution_dir = EXEC_FORWARD; |
d02ed0bb | 1068 | |
f6ac5f3d | 1069 | /* "resume" target method. Resume the process record target. */ |
d02ed0bb | 1070 | |
f6ac5f3d PA |
1071 | void |
1072 | record_full_target::resume (ptid_t ptid, int step, enum gdb_signal signal) | |
d02ed0bb | 1073 | { |
88d1aa9d MM |
1074 | record_full_resume_step = step; |
1075 | record_full_resumed = 1; | |
f6ac5f3d | 1076 | record_full_execution_dir = ::execution_direction; |
d02ed0bb | 1077 | |
88d1aa9d | 1078 | if (!RECORD_FULL_IS_REPLAY) |
d02ed0bb MM |
1079 | { |
1080 | struct gdbarch *gdbarch = target_thread_architecture (ptid); | |
1081 | ||
88d1aa9d | 1082 | record_full_message (get_current_regcache (), signal); |
d02ed0bb MM |
1083 | |
1084 | if (!step) | |
1085 | { | |
1086 | /* This is not hard single step. */ | |
1087 | if (!gdbarch_software_single_step_p (gdbarch)) | |
1088 | { | |
1089 | /* This is a normal continue. */ | |
1090 | step = 1; | |
1091 | } | |
1092 | else | |
1093 | { | |
8ce9efb0 | 1094 | /* This arch supports soft single step. */ |
34b7e8a6 | 1095 | if (thread_has_single_step_breakpoints_set (inferior_thread ())) |
d02ed0bb MM |
1096 | { |
1097 | /* This is a soft single step. */ | |
88d1aa9d | 1098 | record_full_resume_step = 1; |
d02ed0bb MM |
1099 | } |
1100 | else | |
93f9a11f | 1101 | step = !insert_single_step_breakpoints (gdbarch); |
d02ed0bb MM |
1102 | } |
1103 | } | |
1104 | ||
1105 | /* Make sure the target beneath reports all signals. */ | |
1106 | target_pass_signals (0, NULL); | |
1107 | ||
b6a8c27b | 1108 | this->beneath ()->resume (ptid, step, signal); |
d02ed0bb MM |
1109 | } |
1110 | ||
1111 | /* We are about to start executing the inferior (or simulate it), | |
1112 | let's register it with the event loop. */ | |
1113 | if (target_can_async_p ()) | |
6a3753b3 | 1114 | target_async (1); |
d02ed0bb MM |
1115 | } |
1116 | ||
f6ac5f3d | 1117 | /* "commit_resume" method for process record target. */ |
85ad3aaf | 1118 | |
f6ac5f3d PA |
1119 | void |
1120 | record_full_target::commit_resume () | |
85ad3aaf PA |
1121 | { |
1122 | if (!RECORD_FULL_IS_REPLAY) | |
b6a8c27b | 1123 | beneath ()->commit_resume (); |
85ad3aaf PA |
1124 | } |
1125 | ||
88d1aa9d | 1126 | static int record_full_get_sig = 0; |
d02ed0bb | 1127 | |
f6ac5f3d | 1128 | /* SIGINT signal handler, registered by "wait" method. */ |
d02ed0bb MM |
1129 | |
1130 | static void | |
88d1aa9d | 1131 | record_full_sig_handler (int signo) |
d02ed0bb MM |
1132 | { |
1133 | if (record_debug) | |
1134 | fprintf_unfiltered (gdb_stdlog, "Process record: get a signal\n"); | |
1135 | ||
1136 | /* It will break the running inferior in replay mode. */ | |
88d1aa9d | 1137 | record_full_resume_step = 1; |
d02ed0bb | 1138 | |
88d1aa9d | 1139 | /* It will let record_full_wait set inferior status to get the signal |
d02ed0bb | 1140 | SIGINT. */ |
88d1aa9d | 1141 | record_full_get_sig = 1; |
d02ed0bb MM |
1142 | } |
1143 | ||
f6ac5f3d | 1144 | /* "wait" target method for process record target. |
d02ed0bb MM |
1145 | |
1146 | In record mode, the target is always run in singlestep mode | |
f6ac5f3d | 1147 | (even when gdb says to continue). The wait method intercepts |
d02ed0bb MM |
1148 | the stop events and determines which ones are to be passed on to |
1149 | gdb. Most stop events are just singlestep events that gdb is not | |
f6ac5f3d | 1150 | to know about, so the wait method just records them and keeps |
d02ed0bb MM |
1151 | singlestepping. |
1152 | ||
1153 | In replay mode, this function emulates the recorded execution log, | |
1154 | one instruction at a time (forward or backward), and determines | |
1155 | where to stop. */ | |
1156 | ||
1157 | static ptid_t | |
88d1aa9d MM |
1158 | record_full_wait_1 (struct target_ops *ops, |
1159 | ptid_t ptid, struct target_waitstatus *status, | |
1160 | int options) | |
d02ed0bb | 1161 | { |
07036511 TT |
1162 | scoped_restore restore_operation_disable |
1163 | = record_full_gdb_operation_disable_set (); | |
d02ed0bb MM |
1164 | |
1165 | if (record_debug) | |
1166 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d MM |
1167 | "Process record: record_full_wait " |
1168 | "record_full_resume_step = %d, " | |
1169 | "record_full_resumed = %d, direction=%s\n", | |
1170 | record_full_resume_step, record_full_resumed, | |
1171 | record_full_execution_dir == EXEC_FORWARD | |
1172 | ? "forward" : "reverse"); | |
1173 | ||
1174 | if (!record_full_resumed) | |
d02ed0bb MM |
1175 | { |
1176 | gdb_assert ((options & TARGET_WNOHANG) != 0); | |
1177 | ||
1178 | /* No interesting event. */ | |
1179 | status->kind = TARGET_WAITKIND_IGNORE; | |
1180 | return minus_one_ptid; | |
1181 | } | |
1182 | ||
88d1aa9d MM |
1183 | record_full_get_sig = 0; |
1184 | signal (SIGINT, record_full_sig_handler); | |
d02ed0bb | 1185 | |
9e8915c6 PA |
1186 | record_full_stop_reason = TARGET_STOPPED_BY_NO_REASON; |
1187 | ||
88d1aa9d | 1188 | if (!RECORD_FULL_IS_REPLAY && ops != &record_full_core_ops) |
d02ed0bb | 1189 | { |
88d1aa9d | 1190 | if (record_full_resume_step) |
d02ed0bb MM |
1191 | { |
1192 | /* This is a single step. */ | |
b6a8c27b | 1193 | return ops->beneath ()->wait (ptid, status, options); |
d02ed0bb MM |
1194 | } |
1195 | else | |
1196 | { | |
1197 | /* This is not a single step. */ | |
1198 | ptid_t ret; | |
1199 | CORE_ADDR tmp_pc; | |
1200 | struct gdbarch *gdbarch = target_thread_architecture (inferior_ptid); | |
1201 | ||
1202 | while (1) | |
1203 | { | |
b6a8c27b | 1204 | ret = ops->beneath ()->wait (ptid, status, options); |
d02ed0bb MM |
1205 | if (status->kind == TARGET_WAITKIND_IGNORE) |
1206 | { | |
1207 | if (record_debug) | |
1208 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 1209 | "Process record: record_full_wait " |
d02ed0bb MM |
1210 | "target beneath not done yet\n"); |
1211 | return ret; | |
1212 | } | |
1213 | ||
08036331 | 1214 | for (thread_info *tp : all_non_exited_threads ()) |
34b7e8a6 | 1215 | delete_single_step_breakpoints (tp); |
d02ed0bb | 1216 | |
88d1aa9d | 1217 | if (record_full_resume_step) |
d02ed0bb MM |
1218 | return ret; |
1219 | ||
1220 | /* Is this a SIGTRAP? */ | |
1221 | if (status->kind == TARGET_WAITKIND_STOPPED | |
1222 | && status->value.sig == GDB_SIGNAL_TRAP) | |
1223 | { | |
1224 | struct regcache *regcache; | |
9e8915c6 PA |
1225 | enum target_stop_reason *stop_reason_p |
1226 | = &record_full_stop_reason; | |
d02ed0bb MM |
1227 | |
1228 | /* Yes -- this is likely our single-step finishing, | |
1229 | but check if there's any reason the core would be | |
1230 | interested in the event. */ | |
1231 | ||
1232 | registers_changed (); | |
1233 | regcache = get_current_regcache (); | |
1234 | tmp_pc = regcache_read_pc (regcache); | |
8b86c959 | 1235 | const struct address_space *aspace = regcache->aspace (); |
d02ed0bb MM |
1236 | |
1237 | if (target_stopped_by_watchpoint ()) | |
1238 | { | |
1239 | /* Always interested in watchpoints. */ | |
1240 | } | |
9e8915c6 PA |
1241 | else if (record_check_stopped_by_breakpoint (aspace, tmp_pc, |
1242 | stop_reason_p)) | |
d02ed0bb MM |
1243 | { |
1244 | /* There is a breakpoint here. Let the core | |
1245 | handle it. */ | |
d02ed0bb MM |
1246 | } |
1247 | else | |
1248 | { | |
1249 | /* This is a single-step trap. Record the | |
1250 | insn and issue another step. | |
1251 | FIXME: this part can be a random SIGTRAP too. | |
1252 | But GDB cannot handle it. */ | |
1253 | int step = 1; | |
1254 | ||
88d1aa9d MM |
1255 | if (!record_full_message_wrapper_safe (regcache, |
1256 | GDB_SIGNAL_0)) | |
d02ed0bb MM |
1257 | { |
1258 | status->kind = TARGET_WAITKIND_STOPPED; | |
1259 | status->value.sig = GDB_SIGNAL_0; | |
1260 | break; | |
1261 | } | |
1262 | ||
1263 | if (gdbarch_software_single_step_p (gdbarch)) | |
1264 | { | |
1265 | /* Try to insert the software single step breakpoint. | |
1266 | If insert success, set step to 0. */ | |
1267 | set_executing (inferior_ptid, 0); | |
1268 | reinit_frame_cache (); | |
93f9a11f YQ |
1269 | |
1270 | step = !insert_single_step_breakpoints (gdbarch); | |
1271 | ||
d02ed0bb MM |
1272 | set_executing (inferior_ptid, 1); |
1273 | } | |
1274 | ||
1275 | if (record_debug) | |
1276 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d MM |
1277 | "Process record: record_full_wait " |
1278 | "issuing one more step in the " | |
1279 | "target beneath\n"); | |
b6a8c27b PA |
1280 | ops->beneath ()->resume (ptid, step, GDB_SIGNAL_0); |
1281 | ops->beneath ()->commit_resume (); | |
d02ed0bb MM |
1282 | continue; |
1283 | } | |
1284 | } | |
1285 | ||
1286 | /* The inferior is broken by a breakpoint or a signal. */ | |
1287 | break; | |
1288 | } | |
1289 | ||
1290 | return ret; | |
1291 | } | |
1292 | } | |
1293 | else | |
1294 | { | |
1295 | struct regcache *regcache = get_current_regcache (); | |
ac7936df | 1296 | struct gdbarch *gdbarch = regcache->arch (); |
8b86c959 | 1297 | const struct address_space *aspace = regcache->aspace (); |
d02ed0bb | 1298 | int continue_flag = 1; |
88d1aa9d | 1299 | int first_record_full_end = 1; |
d02ed0bb | 1300 | |
1ddbba9d | 1301 | TRY |
d02ed0bb | 1302 | { |
1ddbba9d | 1303 | CORE_ADDR tmp_pc; |
d02ed0bb | 1304 | |
1ddbba9d TT |
1305 | record_full_stop_reason = TARGET_STOPPED_BY_NO_REASON; |
1306 | status->kind = TARGET_WAITKIND_STOPPED; | |
d02ed0bb | 1307 | |
1ddbba9d TT |
1308 | /* Check breakpoint when forward execute. */ |
1309 | if (execution_direction == EXEC_FORWARD) | |
d02ed0bb | 1310 | { |
1ddbba9d TT |
1311 | tmp_pc = regcache_read_pc (regcache); |
1312 | if (record_check_stopped_by_breakpoint (aspace, tmp_pc, | |
1313 | &record_full_stop_reason)) | |
1314 | { | |
1315 | if (record_debug) | |
1316 | fprintf_unfiltered (gdb_stdlog, | |
1317 | "Process record: break at %s.\n", | |
1318 | paddress (gdbarch, tmp_pc)); | |
1319 | goto replay_out; | |
1320 | } | |
d02ed0bb MM |
1321 | } |
1322 | ||
1ddbba9d TT |
1323 | /* If GDB is in terminal_inferior mode, it will not get the |
1324 | signal. And in GDB replay mode, GDB doesn't need to be | |
1325 | in terminal_inferior mode, because inferior will not | |
1326 | executed. Then set it to terminal_ours to make GDB get | |
1327 | the signal. */ | |
1328 | target_terminal::ours (); | |
1329 | ||
1330 | /* In EXEC_FORWARD mode, record_full_list points to the tail of prev | |
1331 | instruction. */ | |
1332 | if (execution_direction == EXEC_FORWARD && record_full_list->next) | |
1333 | record_full_list = record_full_list->next; | |
1334 | ||
1335 | /* Loop over the record_full_list, looking for the next place to | |
1336 | stop. */ | |
1337 | do | |
d02ed0bb | 1338 | { |
1ddbba9d TT |
1339 | /* Check for beginning and end of log. */ |
1340 | if (execution_direction == EXEC_REVERSE | |
1341 | && record_full_list == &record_full_first) | |
d02ed0bb | 1342 | { |
1ddbba9d TT |
1343 | /* Hit beginning of record log in reverse. */ |
1344 | status->kind = TARGET_WAITKIND_NO_HISTORY; | |
1345 | break; | |
d02ed0bb | 1346 | } |
1ddbba9d TT |
1347 | if (execution_direction != EXEC_REVERSE |
1348 | && !record_full_list->next) | |
1349 | { | |
1350 | /* Hit end of record log going forward. */ | |
1351 | status->kind = TARGET_WAITKIND_NO_HISTORY; | |
1352 | break; | |
1353 | } | |
1354 | ||
1355 | record_full_exec_insn (regcache, gdbarch, record_full_list); | |
1356 | ||
1357 | if (record_full_list->type == record_full_end) | |
d02ed0bb | 1358 | { |
1ddbba9d TT |
1359 | if (record_debug > 1) |
1360 | fprintf_unfiltered | |
1361 | (gdb_stdlog, | |
1362 | "Process record: record_full_end %s to " | |
1363 | "inferior.\n", | |
1364 | host_address_to_string (record_full_list)); | |
1365 | ||
1366 | if (first_record_full_end | |
1367 | && execution_direction == EXEC_REVERSE) | |
d02ed0bb | 1368 | { |
1ddbba9d TT |
1369 | /* When reverse excute, the first |
1370 | record_full_end is the part of current | |
1371 | instruction. */ | |
1372 | first_record_full_end = 0; | |
d02ed0bb | 1373 | } |
1ddbba9d | 1374 | else |
d02ed0bb | 1375 | { |
1ddbba9d TT |
1376 | /* In EXEC_REVERSE mode, this is the |
1377 | record_full_end of prev instruction. In | |
1378 | EXEC_FORWARD mode, this is the | |
1379 | record_full_end of current instruction. */ | |
1380 | /* step */ | |
1381 | if (record_full_resume_step) | |
1382 | { | |
1383 | if (record_debug > 1) | |
1384 | fprintf_unfiltered (gdb_stdlog, | |
1385 | "Process record: step.\n"); | |
1386 | continue_flag = 0; | |
1387 | } | |
9e8915c6 | 1388 | |
1ddbba9d TT |
1389 | /* check breakpoint */ |
1390 | tmp_pc = regcache_read_pc (regcache); | |
1391 | if (record_check_stopped_by_breakpoint | |
1392 | (aspace, tmp_pc, &record_full_stop_reason)) | |
1393 | { | |
1394 | if (record_debug) | |
1395 | fprintf_unfiltered (gdb_stdlog, | |
1396 | "Process record: break " | |
1397 | "at %s.\n", | |
1398 | paddress (gdbarch, tmp_pc)); | |
d02ed0bb | 1399 | |
1ddbba9d TT |
1400 | continue_flag = 0; |
1401 | } | |
1402 | ||
1403 | if (record_full_stop_reason | |
1404 | == TARGET_STOPPED_BY_WATCHPOINT) | |
1405 | { | |
1406 | if (record_debug) | |
1407 | fprintf_unfiltered (gdb_stdlog, | |
1408 | "Process record: hit hw " | |
1409 | "watchpoint.\n"); | |
1410 | continue_flag = 0; | |
1411 | } | |
1412 | /* Check target signal */ | |
1413 | if (record_full_list->u.end.sigval != GDB_SIGNAL_0) | |
1414 | /* FIXME: better way to check */ | |
1415 | continue_flag = 0; | |
d02ed0bb | 1416 | } |
d02ed0bb | 1417 | } |
d02ed0bb | 1418 | |
1ddbba9d | 1419 | if (continue_flag) |
d02ed0bb | 1420 | { |
1ddbba9d TT |
1421 | if (execution_direction == EXEC_REVERSE) |
1422 | { | |
1423 | if (record_full_list->prev) | |
1424 | record_full_list = record_full_list->prev; | |
1425 | } | |
1426 | else | |
1427 | { | |
1428 | if (record_full_list->next) | |
1429 | record_full_list = record_full_list->next; | |
1430 | } | |
d02ed0bb MM |
1431 | } |
1432 | } | |
1ddbba9d TT |
1433 | while (continue_flag); |
1434 | ||
1435 | replay_out: | |
1436 | if (record_full_get_sig) | |
1437 | status->value.sig = GDB_SIGNAL_INT; | |
1438 | else if (record_full_list->u.end.sigval != GDB_SIGNAL_0) | |
1439 | /* FIXME: better way to check */ | |
1440 | status->value.sig = record_full_list->u.end.sigval; | |
1441 | else | |
1442 | status->value.sig = GDB_SIGNAL_TRAP; | |
d02ed0bb | 1443 | } |
1ddbba9d TT |
1444 | CATCH (ex, RETURN_MASK_ALL) |
1445 | { | |
1446 | if (execution_direction == EXEC_REVERSE) | |
1447 | { | |
1448 | if (record_full_list->next) | |
1449 | record_full_list = record_full_list->next; | |
1450 | } | |
1451 | else | |
1452 | record_full_list = record_full_list->prev; | |
d02ed0bb | 1453 | |
1ddbba9d TT |
1454 | throw_exception (ex); |
1455 | } | |
1456 | END_CATCH | |
d02ed0bb MM |
1457 | } |
1458 | ||
1459 | signal (SIGINT, handle_sigint); | |
1460 | ||
d02ed0bb MM |
1461 | return inferior_ptid; |
1462 | } | |
1463 | ||
f6ac5f3d PA |
1464 | ptid_t |
1465 | record_full_base_target::wait (ptid_t ptid, struct target_waitstatus *status, | |
1466 | int options) | |
d02ed0bb MM |
1467 | { |
1468 | ptid_t return_ptid; | |
1469 | ||
f6ac5f3d | 1470 | return_ptid = record_full_wait_1 (this, ptid, status, options); |
d02ed0bb MM |
1471 | if (status->kind != TARGET_WAITKIND_IGNORE) |
1472 | { | |
1473 | /* We're reporting a stop. Make sure any spurious | |
1474 | target_wait(WNOHANG) doesn't advance the target until the | |
1475 | core wants us resumed again. */ | |
88d1aa9d | 1476 | record_full_resumed = 0; |
d02ed0bb MM |
1477 | } |
1478 | return return_ptid; | |
1479 | } | |
1480 | ||
57810aa7 | 1481 | bool |
f6ac5f3d | 1482 | record_full_base_target::stopped_by_watchpoint () |
d02ed0bb | 1483 | { |
88d1aa9d | 1484 | if (RECORD_FULL_IS_REPLAY) |
9e8915c6 | 1485 | return record_full_stop_reason == TARGET_STOPPED_BY_WATCHPOINT; |
d02ed0bb | 1486 | else |
b6a8c27b | 1487 | return beneath ()->stopped_by_watchpoint (); |
d02ed0bb MM |
1488 | } |
1489 | ||
57810aa7 | 1490 | bool |
f6ac5f3d | 1491 | record_full_base_target::stopped_data_address (CORE_ADDR *addr_p) |
d02ed0bb | 1492 | { |
88d1aa9d | 1493 | if (RECORD_FULL_IS_REPLAY) |
57810aa7 | 1494 | return false; |
d02ed0bb | 1495 | else |
b6a8c27b | 1496 | return this->beneath ()->stopped_data_address (addr_p); |
d02ed0bb MM |
1497 | } |
1498 | ||
f6ac5f3d | 1499 | /* The stopped_by_sw_breakpoint method of target record-full. */ |
9e8915c6 | 1500 | |
57810aa7 | 1501 | bool |
f6ac5f3d | 1502 | record_full_base_target::stopped_by_sw_breakpoint () |
9e8915c6 PA |
1503 | { |
1504 | return record_full_stop_reason == TARGET_STOPPED_BY_SW_BREAKPOINT; | |
1505 | } | |
1506 | ||
f6ac5f3d | 1507 | /* The supports_stopped_by_sw_breakpoint method of target |
9e8915c6 PA |
1508 | record-full. */ |
1509 | ||
57810aa7 | 1510 | bool |
f6ac5f3d | 1511 | record_full_base_target::supports_stopped_by_sw_breakpoint () |
9e8915c6 | 1512 | { |
57810aa7 | 1513 | return true; |
9e8915c6 PA |
1514 | } |
1515 | ||
f6ac5f3d | 1516 | /* The stopped_by_hw_breakpoint method of target record-full. */ |
9e8915c6 | 1517 | |
57810aa7 | 1518 | bool |
f6ac5f3d | 1519 | record_full_base_target::stopped_by_hw_breakpoint () |
9e8915c6 PA |
1520 | { |
1521 | return record_full_stop_reason == TARGET_STOPPED_BY_HW_BREAKPOINT; | |
1522 | } | |
1523 | ||
f6ac5f3d | 1524 | /* The supports_stopped_by_sw_breakpoint method of target |
9e8915c6 PA |
1525 | record-full. */ |
1526 | ||
57810aa7 | 1527 | bool |
f6ac5f3d | 1528 | record_full_base_target::supports_stopped_by_hw_breakpoint () |
9e8915c6 | 1529 | { |
57810aa7 | 1530 | return true; |
9e8915c6 PA |
1531 | } |
1532 | ||
d02ed0bb MM |
1533 | /* Record registers change (by user or by GDB) to list as an instruction. */ |
1534 | ||
1535 | static void | |
88d1aa9d | 1536 | record_full_registers_change (struct regcache *regcache, int regnum) |
d02ed0bb | 1537 | { |
88d1aa9d | 1538 | /* Check record_full_insn_num. */ |
651ce16a | 1539 | record_full_check_insn_num (); |
d02ed0bb | 1540 | |
88d1aa9d MM |
1541 | record_full_arch_list_head = NULL; |
1542 | record_full_arch_list_tail = NULL; | |
d02ed0bb MM |
1543 | |
1544 | if (regnum < 0) | |
1545 | { | |
1546 | int i; | |
1547 | ||
ac7936df | 1548 | for (i = 0; i < gdbarch_num_regs (regcache->arch ()); i++) |
d02ed0bb | 1549 | { |
25ea693b | 1550 | if (record_full_arch_list_add_reg (regcache, i)) |
d02ed0bb | 1551 | { |
88d1aa9d | 1552 | record_full_list_release (record_full_arch_list_tail); |
d02ed0bb MM |
1553 | error (_("Process record: failed to record execution log.")); |
1554 | } | |
1555 | } | |
1556 | } | |
1557 | else | |
1558 | { | |
25ea693b | 1559 | if (record_full_arch_list_add_reg (regcache, regnum)) |
d02ed0bb | 1560 | { |
88d1aa9d | 1561 | record_full_list_release (record_full_arch_list_tail); |
d02ed0bb MM |
1562 | error (_("Process record: failed to record execution log.")); |
1563 | } | |
1564 | } | |
25ea693b | 1565 | if (record_full_arch_list_add_end ()) |
d02ed0bb | 1566 | { |
88d1aa9d | 1567 | record_full_list_release (record_full_arch_list_tail); |
d02ed0bb MM |
1568 | error (_("Process record: failed to record execution log.")); |
1569 | } | |
88d1aa9d MM |
1570 | record_full_list->next = record_full_arch_list_head; |
1571 | record_full_arch_list_head->prev = record_full_list; | |
1572 | record_full_list = record_full_arch_list_tail; | |
d02ed0bb | 1573 | |
7ee70bf5 | 1574 | if (record_full_insn_num == record_full_insn_max_num) |
88d1aa9d | 1575 | record_full_list_release_first (); |
d02ed0bb | 1576 | else |
88d1aa9d | 1577 | record_full_insn_num++; |
d02ed0bb MM |
1578 | } |
1579 | ||
f6ac5f3d | 1580 | /* "store_registers" method for process record target. */ |
d02ed0bb | 1581 | |
f6ac5f3d PA |
1582 | void |
1583 | record_full_target::store_registers (struct regcache *regcache, int regno) | |
d02ed0bb | 1584 | { |
88d1aa9d | 1585 | if (!record_full_gdb_operation_disable) |
d02ed0bb | 1586 | { |
88d1aa9d | 1587 | if (RECORD_FULL_IS_REPLAY) |
d02ed0bb MM |
1588 | { |
1589 | int n; | |
1590 | ||
1591 | /* Let user choose if he wants to write register or not. */ | |
1592 | if (regno < 0) | |
1593 | n = | |
1594 | query (_("Because GDB is in replay mode, changing the " | |
1595 | "value of a register will make the execution " | |
1596 | "log unusable from this point onward. " | |
1597 | "Change all registers?")); | |
1598 | else | |
1599 | n = | |
1600 | query (_("Because GDB is in replay mode, changing the value " | |
1601 | "of a register will make the execution log unusable " | |
1602 | "from this point onward. Change register %s?"), | |
ac7936df | 1603 | gdbarch_register_name (regcache->arch (), |
d02ed0bb MM |
1604 | regno)); |
1605 | ||
1606 | if (!n) | |
1607 | { | |
1608 | /* Invalidate the value of regcache that was set in function | |
1609 | "regcache_raw_write". */ | |
1610 | if (regno < 0) | |
1611 | { | |
1612 | int i; | |
1613 | ||
1614 | for (i = 0; | |
ac7936df | 1615 | i < gdbarch_num_regs (regcache->arch ()); |
d02ed0bb | 1616 | i++) |
6aa7d724 | 1617 | regcache->invalidate (i); |
d02ed0bb MM |
1618 | } |
1619 | else | |
6aa7d724 | 1620 | regcache->invalidate (regno); |
d02ed0bb MM |
1621 | |
1622 | error (_("Process record canceled the operation.")); | |
1623 | } | |
1624 | ||
1625 | /* Destroy the record from here forward. */ | |
88d1aa9d | 1626 | record_full_list_release_following (record_full_list); |
d02ed0bb MM |
1627 | } |
1628 | ||
88d1aa9d | 1629 | record_full_registers_change (regcache, regno); |
d02ed0bb | 1630 | } |
b6a8c27b | 1631 | this->beneath ()->store_registers (regcache, regno); |
d02ed0bb MM |
1632 | } |
1633 | ||
f6ac5f3d | 1634 | /* "xfer_partial" method. Behavior is conditional on |
88d1aa9d | 1635 | RECORD_FULL_IS_REPLAY. |
d02ed0bb MM |
1636 | In replay mode, we cannot write memory unles we are willing to |
1637 | invalidate the record/replay log from this point forward. */ | |
1638 | ||
f6ac5f3d PA |
1639 | enum target_xfer_status |
1640 | record_full_target::xfer_partial (enum target_object object, | |
1641 | const char *annex, gdb_byte *readbuf, | |
1642 | const gdb_byte *writebuf, ULONGEST offset, | |
1643 | ULONGEST len, ULONGEST *xfered_len) | |
d02ed0bb | 1644 | { |
88d1aa9d | 1645 | if (!record_full_gdb_operation_disable |
d02ed0bb MM |
1646 | && (object == TARGET_OBJECT_MEMORY |
1647 | || object == TARGET_OBJECT_RAW_MEMORY) && writebuf) | |
1648 | { | |
88d1aa9d | 1649 | if (RECORD_FULL_IS_REPLAY) |
d02ed0bb MM |
1650 | { |
1651 | /* Let user choose if he wants to write memory or not. */ | |
1652 | if (!query (_("Because GDB is in replay mode, writing to memory " | |
1653 | "will make the execution log unusable from this " | |
1654 | "point onward. Write memory at address %s?"), | |
1655 | paddress (target_gdbarch (), offset))) | |
1656 | error (_("Process record canceled the operation.")); | |
1657 | ||
1658 | /* Destroy the record from here forward. */ | |
88d1aa9d | 1659 | record_full_list_release_following (record_full_list); |
d02ed0bb MM |
1660 | } |
1661 | ||
88d1aa9d | 1662 | /* Check record_full_insn_num */ |
651ce16a | 1663 | record_full_check_insn_num (); |
d02ed0bb MM |
1664 | |
1665 | /* Record registers change to list as an instruction. */ | |
88d1aa9d MM |
1666 | record_full_arch_list_head = NULL; |
1667 | record_full_arch_list_tail = NULL; | |
25ea693b | 1668 | if (record_full_arch_list_add_mem (offset, len)) |
d02ed0bb | 1669 | { |
88d1aa9d | 1670 | record_full_list_release (record_full_arch_list_tail); |
d02ed0bb MM |
1671 | if (record_debug) |
1672 | fprintf_unfiltered (gdb_stdlog, | |
1673 | "Process record: failed to record " | |
1674 | "execution log."); | |
2ed4b548 | 1675 | return TARGET_XFER_E_IO; |
d02ed0bb | 1676 | } |
25ea693b | 1677 | if (record_full_arch_list_add_end ()) |
d02ed0bb | 1678 | { |
88d1aa9d | 1679 | record_full_list_release (record_full_arch_list_tail); |
d02ed0bb MM |
1680 | if (record_debug) |
1681 | fprintf_unfiltered (gdb_stdlog, | |
1682 | "Process record: failed to record " | |
1683 | "execution log."); | |
2ed4b548 | 1684 | return TARGET_XFER_E_IO; |
d02ed0bb | 1685 | } |
88d1aa9d MM |
1686 | record_full_list->next = record_full_arch_list_head; |
1687 | record_full_arch_list_head->prev = record_full_list; | |
1688 | record_full_list = record_full_arch_list_tail; | |
d02ed0bb | 1689 | |
7ee70bf5 | 1690 | if (record_full_insn_num == record_full_insn_max_num) |
88d1aa9d | 1691 | record_full_list_release_first (); |
d02ed0bb | 1692 | else |
88d1aa9d | 1693 | record_full_insn_num++; |
d02ed0bb MM |
1694 | } |
1695 | ||
b6a8c27b PA |
1696 | return this->beneath ()->xfer_partial (object, annex, readbuf, writebuf, |
1697 | offset, len, xfered_len); | |
d02ed0bb MM |
1698 | } |
1699 | ||
1700 | /* This structure represents a breakpoint inserted while the record | |
1701 | target is active. We use this to know when to install/remove | |
1702 | breakpoints in/from the target beneath. For example, a breakpoint | |
1703 | may be inserted while recording, but removed when not replaying nor | |
1704 | recording. In that case, the breakpoint had not been inserted on | |
1705 | the target beneath, so we should not try to remove it there. */ | |
1706 | ||
88d1aa9d | 1707 | struct record_full_breakpoint |
d02ed0bb | 1708 | { |
219605fd TT |
1709 | record_full_breakpoint (struct address_space *address_space_, |
1710 | CORE_ADDR addr_, | |
1711 | bool in_target_beneath_) | |
1712 | : address_space (address_space_), | |
1713 | addr (addr_), | |
1714 | in_target_beneath (in_target_beneath_) | |
1715 | { | |
1716 | } | |
1717 | ||
d02ed0bb MM |
1718 | /* The address and address space the breakpoint was set at. */ |
1719 | struct address_space *address_space; | |
1720 | CORE_ADDR addr; | |
1721 | ||
1722 | /* True when the breakpoint has been also installed in the target | |
1723 | beneath. This will be false for breakpoints set during replay or | |
1724 | when recording. */ | |
219605fd | 1725 | bool in_target_beneath; |
d02ed0bb MM |
1726 | }; |
1727 | ||
d02ed0bb MM |
1728 | /* The list of breakpoints inserted while the record target is |
1729 | active. */ | |
219605fd | 1730 | static std::vector<record_full_breakpoint> record_full_breakpoints; |
d02ed0bb MM |
1731 | |
1732 | static void | |
88d1aa9d | 1733 | record_full_sync_record_breakpoints (struct bp_location *loc, void *data) |
d02ed0bb MM |
1734 | { |
1735 | if (loc->loc_type != bp_loc_software_breakpoint) | |
1736 | return; | |
1737 | ||
1738 | if (loc->inserted) | |
1739 | { | |
219605fd TT |
1740 | record_full_breakpoints.emplace_back |
1741 | (loc->target_info.placed_address_space, | |
1742 | loc->target_info.placed_address, | |
1743 | 1); | |
d02ed0bb MM |
1744 | } |
1745 | } | |
1746 | ||
88d1aa9d | 1747 | /* Sync existing breakpoints to record_full_breakpoints. */ |
d02ed0bb MM |
1748 | |
1749 | static void | |
88d1aa9d | 1750 | record_full_init_record_breakpoints (void) |
d02ed0bb | 1751 | { |
219605fd | 1752 | record_full_breakpoints.clear (); |
d02ed0bb | 1753 | |
88d1aa9d | 1754 | iterate_over_bp_locations (record_full_sync_record_breakpoints); |
d02ed0bb MM |
1755 | } |
1756 | ||
88d1aa9d | 1757 | /* Behavior is conditional on RECORD_FULL_IS_REPLAY. We will not actually |
d02ed0bb MM |
1758 | insert or remove breakpoints in the real target when replaying, nor |
1759 | when recording. */ | |
1760 | ||
f6ac5f3d PA |
1761 | int |
1762 | record_full_target::insert_breakpoint (struct gdbarch *gdbarch, | |
1763 | struct bp_target_info *bp_tgt) | |
d02ed0bb | 1764 | { |
219605fd | 1765 | bool in_target_beneath = false; |
d02ed0bb | 1766 | |
88d1aa9d | 1767 | if (!RECORD_FULL_IS_REPLAY) |
d02ed0bb MM |
1768 | { |
1769 | /* When recording, we currently always single-step, so we don't | |
1770 | really need to install regular breakpoints in the inferior. | |
1771 | However, we do have to insert software single-step | |
1772 | breakpoints, in case the target can't hardware step. To keep | |
f99bd5f2 | 1773 | things simple, we always insert. */ |
d02ed0bb | 1774 | |
07036511 TT |
1775 | scoped_restore restore_operation_disable |
1776 | = record_full_gdb_operation_disable_set (); | |
d02ed0bb | 1777 | |
b6a8c27b | 1778 | int ret = this->beneath ()->insert_breakpoint (gdbarch, bp_tgt); |
d02ed0bb MM |
1779 | if (ret != 0) |
1780 | return ret; | |
1781 | ||
219605fd | 1782 | in_target_beneath = true; |
d02ed0bb MM |
1783 | } |
1784 | ||
e390720b YQ |
1785 | /* Use the existing entries if found in order to avoid duplication |
1786 | in record_full_breakpoints. */ | |
1787 | ||
19f3f25f | 1788 | for (const record_full_breakpoint &bp : record_full_breakpoints) |
e390720b | 1789 | { |
219605fd TT |
1790 | if (bp.addr == bp_tgt->placed_address |
1791 | && bp.address_space == bp_tgt->placed_address_space) | |
e390720b | 1792 | { |
219605fd | 1793 | gdb_assert (bp.in_target_beneath == in_target_beneath); |
e390720b YQ |
1794 | return 0; |
1795 | } | |
1796 | } | |
1797 | ||
219605fd TT |
1798 | record_full_breakpoints.emplace_back (bp_tgt->placed_address_space, |
1799 | bp_tgt->placed_address, | |
1800 | in_target_beneath); | |
d02ed0bb MM |
1801 | return 0; |
1802 | } | |
1803 | ||
f6ac5f3d | 1804 | /* "remove_breakpoint" method for process record target. */ |
d02ed0bb | 1805 | |
f6ac5f3d PA |
1806 | int |
1807 | record_full_target::remove_breakpoint (struct gdbarch *gdbarch, | |
1808 | struct bp_target_info *bp_tgt, | |
1809 | enum remove_bp_reason reason) | |
d02ed0bb | 1810 | { |
219605fd TT |
1811 | for (auto iter = record_full_breakpoints.begin (); |
1812 | iter != record_full_breakpoints.end (); | |
1813 | ++iter) | |
d02ed0bb | 1814 | { |
219605fd TT |
1815 | struct record_full_breakpoint &bp = *iter; |
1816 | ||
1817 | if (bp.addr == bp_tgt->placed_address | |
1818 | && bp.address_space == bp_tgt->placed_address_space) | |
d02ed0bb | 1819 | { |
219605fd | 1820 | if (bp.in_target_beneath) |
d02ed0bb | 1821 | { |
07036511 TT |
1822 | scoped_restore restore_operation_disable |
1823 | = record_full_gdb_operation_disable_set (); | |
f6ac5f3d | 1824 | |
b6a8c27b PA |
1825 | int ret = this->beneath ()->remove_breakpoint (gdbarch, bp_tgt, |
1826 | reason); | |
d02ed0bb MM |
1827 | if (ret != 0) |
1828 | return ret; | |
1829 | } | |
1830 | ||
01d3dedf | 1831 | if (reason == REMOVE_BREAKPOINT) |
219605fd | 1832 | unordered_remove (record_full_breakpoints, iter); |
d02ed0bb MM |
1833 | return 0; |
1834 | } | |
1835 | } | |
1836 | ||
1837 | gdb_assert_not_reached ("removing unknown breakpoint"); | |
1838 | } | |
1839 | ||
f6ac5f3d | 1840 | /* "can_execute_reverse" method for process record target. */ |
d02ed0bb | 1841 | |
57810aa7 | 1842 | bool |
f6ac5f3d | 1843 | record_full_base_target::can_execute_reverse () |
d02ed0bb | 1844 | { |
57810aa7 | 1845 | return true; |
d02ed0bb MM |
1846 | } |
1847 | ||
f6ac5f3d | 1848 | /* "get_bookmark" method for process record and prec over core. */ |
d02ed0bb | 1849 | |
f6ac5f3d PA |
1850 | gdb_byte * |
1851 | record_full_base_target::get_bookmark (const char *args, int from_tty) | |
d02ed0bb | 1852 | { |
0f928d68 | 1853 | char *ret = NULL; |
d02ed0bb MM |
1854 | |
1855 | /* Return stringified form of instruction count. */ | |
88d1aa9d MM |
1856 | if (record_full_list && record_full_list->type == record_full_end) |
1857 | ret = xstrdup (pulongest (record_full_list->u.end.insn_num)); | |
d02ed0bb MM |
1858 | |
1859 | if (record_debug) | |
1860 | { | |
1861 | if (ret) | |
1862 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 1863 | "record_full_get_bookmark returns %s\n", ret); |
d02ed0bb MM |
1864 | else |
1865 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 1866 | "record_full_get_bookmark returns NULL\n"); |
d02ed0bb | 1867 | } |
0f928d68 | 1868 | return (gdb_byte *) ret; |
d02ed0bb MM |
1869 | } |
1870 | ||
f6ac5f3d | 1871 | /* "goto_bookmark" method for process record and prec over core. */ |
d02ed0bb | 1872 | |
f6ac5f3d PA |
1873 | void |
1874 | record_full_base_target::goto_bookmark (const gdb_byte *raw_bookmark, | |
1875 | int from_tty) | |
d02ed0bb | 1876 | { |
c2bcbb1d | 1877 | const char *bookmark = (const char *) raw_bookmark; |
0f928d68 | 1878 | |
d02ed0bb MM |
1879 | if (record_debug) |
1880 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 1881 | "record_full_goto_bookmark receives %s\n", bookmark); |
d02ed0bb | 1882 | |
a2b2bc12 | 1883 | std::string name_holder; |
d02ed0bb MM |
1884 | if (bookmark[0] == '\'' || bookmark[0] == '\"') |
1885 | { | |
1886 | if (bookmark[strlen (bookmark) - 1] != bookmark[0]) | |
1887 | error (_("Unbalanced quotes: %s"), bookmark); | |
1888 | ||
a2b2bc12 TT |
1889 | name_holder = std::string (bookmark + 1, strlen (bookmark) - 2); |
1890 | bookmark = name_holder.c_str (); | |
d02ed0bb MM |
1891 | } |
1892 | ||
c2bcbb1d | 1893 | record_goto (bookmark); |
d02ed0bb MM |
1894 | } |
1895 | ||
f6ac5f3d PA |
1896 | enum exec_direction_kind |
1897 | record_full_base_target::execution_direction () | |
d02ed0bb | 1898 | { |
88d1aa9d | 1899 | return record_full_execution_dir; |
d02ed0bb MM |
1900 | } |
1901 | ||
f6ac5f3d | 1902 | /* The record_method method of target record-full. */ |
b158a20f TW |
1903 | |
1904 | enum record_method | |
f6ac5f3d | 1905 | record_full_base_target::record_method (ptid_t ptid) |
b158a20f TW |
1906 | { |
1907 | return RECORD_METHOD_FULL; | |
1908 | } | |
1909 | ||
f6ac5f3d PA |
1910 | void |
1911 | record_full_base_target::info_record () | |
d02ed0bb | 1912 | { |
88d1aa9d | 1913 | struct record_full_entry *p; |
d02ed0bb | 1914 | |
88d1aa9d | 1915 | if (RECORD_FULL_IS_REPLAY) |
d02ed0bb MM |
1916 | printf_filtered (_("Replay mode:\n")); |
1917 | else | |
1918 | printf_filtered (_("Record mode:\n")); | |
1919 | ||
1920 | /* Find entry for first actual instruction in the log. */ | |
88d1aa9d MM |
1921 | for (p = record_full_first.next; |
1922 | p != NULL && p->type != record_full_end; | |
d02ed0bb MM |
1923 | p = p->next) |
1924 | ; | |
1925 | ||
1926 | /* Do we have a log at all? */ | |
88d1aa9d | 1927 | if (p != NULL && p->type == record_full_end) |
d02ed0bb MM |
1928 | { |
1929 | /* Display instruction number for first instruction in the log. */ | |
1930 | printf_filtered (_("Lowest recorded instruction number is %s.\n"), | |
1931 | pulongest (p->u.end.insn_num)); | |
1932 | ||
1933 | /* If in replay mode, display where we are in the log. */ | |
88d1aa9d | 1934 | if (RECORD_FULL_IS_REPLAY) |
d02ed0bb | 1935 | printf_filtered (_("Current instruction number is %s.\n"), |
88d1aa9d | 1936 | pulongest (record_full_list->u.end.insn_num)); |
d02ed0bb MM |
1937 | |
1938 | /* Display instruction number for last instruction in the log. */ | |
1939 | printf_filtered (_("Highest recorded instruction number is %s.\n"), | |
88d1aa9d | 1940 | pulongest (record_full_insn_count)); |
d02ed0bb MM |
1941 | |
1942 | /* Display log count. */ | |
7ee70bf5 | 1943 | printf_filtered (_("Log contains %u instructions.\n"), |
88d1aa9d | 1944 | record_full_insn_num); |
d02ed0bb MM |
1945 | } |
1946 | else | |
1947 | printf_filtered (_("No instructions have been logged.\n")); | |
1948 | ||
1949 | /* Display max log size. */ | |
7ee70bf5 | 1950 | printf_filtered (_("Max logged instructions is %u.\n"), |
88d1aa9d | 1951 | record_full_insn_max_num); |
d02ed0bb MM |
1952 | } |
1953 | ||
f6ac5f3d PA |
1954 | bool |
1955 | record_full_base_target::supports_delete_record () | |
1956 | { | |
1957 | return true; | |
1958 | } | |
d02ed0bb | 1959 | |
f6ac5f3d PA |
1960 | /* The "delete_record" target method. */ |
1961 | ||
1962 | void | |
1963 | record_full_base_target::delete_record () | |
d02ed0bb | 1964 | { |
88d1aa9d | 1965 | record_full_list_release_following (record_full_list); |
d02ed0bb MM |
1966 | } |
1967 | ||
f6ac5f3d | 1968 | /* The "record_is_replaying" target method. */ |
d02ed0bb | 1969 | |
57810aa7 | 1970 | bool |
f6ac5f3d | 1971 | record_full_base_target::record_is_replaying (ptid_t ptid) |
d02ed0bb | 1972 | { |
88d1aa9d | 1973 | return RECORD_FULL_IS_REPLAY; |
d02ed0bb MM |
1974 | } |
1975 | ||
f6ac5f3d | 1976 | /* The "record_will_replay" target method. */ |
7ff27e9b | 1977 | |
57810aa7 | 1978 | bool |
f6ac5f3d | 1979 | record_full_base_target::record_will_replay (ptid_t ptid, int dir) |
7ff27e9b MM |
1980 | { |
1981 | /* We can currently only record when executing forwards. Should we be able | |
1982 | to record when executing backwards on targets that support reverse | |
1983 | execution, this needs to be changed. */ | |
1984 | ||
1985 | return RECORD_FULL_IS_REPLAY || dir == EXEC_REVERSE; | |
1986 | } | |
1987 | ||
d02ed0bb MM |
1988 | /* Go to a specific entry. */ |
1989 | ||
1990 | static void | |
88d1aa9d | 1991 | record_full_goto_entry (struct record_full_entry *p) |
d02ed0bb MM |
1992 | { |
1993 | if (p == NULL) | |
1994 | error (_("Target insn not found.")); | |
88d1aa9d | 1995 | else if (p == record_full_list) |
d02ed0bb | 1996 | error (_("Already at target insn.")); |
88d1aa9d | 1997 | else if (p->u.end.insn_num > record_full_list->u.end.insn_num) |
d02ed0bb MM |
1998 | { |
1999 | printf_filtered (_("Go forward to insn number %s\n"), | |
2000 | pulongest (p->u.end.insn_num)); | |
88d1aa9d | 2001 | record_full_goto_insn (p, EXEC_FORWARD); |
d02ed0bb MM |
2002 | } |
2003 | else | |
2004 | { | |
2005 | printf_filtered (_("Go backward to insn number %s\n"), | |
2006 | pulongest (p->u.end.insn_num)); | |
88d1aa9d | 2007 | record_full_goto_insn (p, EXEC_REVERSE); |
d02ed0bb MM |
2008 | } |
2009 | ||
2010 | registers_changed (); | |
2011 | reinit_frame_cache (); | |
f2ffa92b PA |
2012 | inferior_thread ()->suspend.stop_pc |
2013 | = regcache_read_pc (get_current_regcache ()); | |
08d72866 | 2014 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); |
d02ed0bb MM |
2015 | } |
2016 | ||
f6ac5f3d | 2017 | /* The "goto_record_begin" target method. */ |
d02ed0bb | 2018 | |
f6ac5f3d PA |
2019 | void |
2020 | record_full_base_target::goto_record_begin () | |
d02ed0bb | 2021 | { |
88d1aa9d | 2022 | struct record_full_entry *p = NULL; |
d02ed0bb | 2023 | |
88d1aa9d MM |
2024 | for (p = &record_full_first; p != NULL; p = p->next) |
2025 | if (p->type == record_full_end) | |
d02ed0bb MM |
2026 | break; |
2027 | ||
88d1aa9d | 2028 | record_full_goto_entry (p); |
d02ed0bb MM |
2029 | } |
2030 | ||
f6ac5f3d | 2031 | /* The "goto_record_end" target method. */ |
d02ed0bb | 2032 | |
f6ac5f3d PA |
2033 | void |
2034 | record_full_base_target::goto_record_end () | |
d02ed0bb | 2035 | { |
88d1aa9d | 2036 | struct record_full_entry *p = NULL; |
d02ed0bb | 2037 | |
88d1aa9d | 2038 | for (p = record_full_list; p->next != NULL; p = p->next) |
d02ed0bb MM |
2039 | ; |
2040 | for (; p!= NULL; p = p->prev) | |
88d1aa9d | 2041 | if (p->type == record_full_end) |
d02ed0bb MM |
2042 | break; |
2043 | ||
88d1aa9d | 2044 | record_full_goto_entry (p); |
d02ed0bb MM |
2045 | } |
2046 | ||
f6ac5f3d | 2047 | /* The "goto_record" target method. */ |
d02ed0bb | 2048 | |
f6ac5f3d PA |
2049 | void |
2050 | record_full_base_target::goto_record (ULONGEST target_insn) | |
d02ed0bb | 2051 | { |
88d1aa9d | 2052 | struct record_full_entry *p = NULL; |
d02ed0bb | 2053 | |
88d1aa9d MM |
2054 | for (p = &record_full_first; p != NULL; p = p->next) |
2055 | if (p->type == record_full_end && p->u.end.insn_num == target_insn) | |
d02ed0bb MM |
2056 | break; |
2057 | ||
88d1aa9d | 2058 | record_full_goto_entry (p); |
d02ed0bb MM |
2059 | } |
2060 | ||
f6ac5f3d | 2061 | /* The "record_stop_replaying" target method. */ |
797094dd | 2062 | |
f6ac5f3d PA |
2063 | void |
2064 | record_full_base_target::record_stop_replaying () | |
797094dd | 2065 | { |
f6ac5f3d | 2066 | goto_record_end (); |
797094dd MM |
2067 | } |
2068 | ||
f6ac5f3d | 2069 | /* "resume" method for prec over corefile. */ |
d02ed0bb | 2070 | |
f6ac5f3d PA |
2071 | void |
2072 | record_full_core_target::resume (ptid_t ptid, int step, | |
2073 | enum gdb_signal signal) | |
d02ed0bb | 2074 | { |
88d1aa9d MM |
2075 | record_full_resume_step = step; |
2076 | record_full_resumed = 1; | |
f6ac5f3d | 2077 | record_full_execution_dir = ::execution_direction; |
d02ed0bb MM |
2078 | |
2079 | /* We are about to start executing the inferior (or simulate it), | |
2080 | let's register it with the event loop. */ | |
2081 | if (target_can_async_p ()) | |
6a3753b3 | 2082 | target_async (1); |
d02ed0bb MM |
2083 | } |
2084 | ||
f6ac5f3d | 2085 | /* "kill" method for prec over corefile. */ |
d02ed0bb | 2086 | |
f6ac5f3d PA |
2087 | void |
2088 | record_full_core_target::kill () | |
d02ed0bb MM |
2089 | { |
2090 | if (record_debug) | |
88d1aa9d | 2091 | fprintf_unfiltered (gdb_stdlog, "Process record: record_full_core_kill\n"); |
d02ed0bb | 2092 | |
f6ac5f3d | 2093 | unpush_target (this); |
d02ed0bb MM |
2094 | } |
2095 | ||
f6ac5f3d | 2096 | /* "fetch_registers" method for prec over corefile. */ |
d02ed0bb | 2097 | |
f6ac5f3d PA |
2098 | void |
2099 | record_full_core_target::fetch_registers (struct regcache *regcache, | |
2100 | int regno) | |
d02ed0bb MM |
2101 | { |
2102 | if (regno < 0) | |
2103 | { | |
ac7936df | 2104 | int num = gdbarch_num_regs (regcache->arch ()); |
d02ed0bb MM |
2105 | int i; |
2106 | ||
2107 | for (i = 0; i < num; i ++) | |
c8ec2f33 | 2108 | regcache->raw_supply (i, *record_full_core_regbuf); |
d02ed0bb MM |
2109 | } |
2110 | else | |
c8ec2f33 | 2111 | regcache->raw_supply (regno, *record_full_core_regbuf); |
d02ed0bb MM |
2112 | } |
2113 | ||
f6ac5f3d | 2114 | /* "prepare_to_store" method for prec over corefile. */ |
d02ed0bb | 2115 | |
f6ac5f3d PA |
2116 | void |
2117 | record_full_core_target::prepare_to_store (struct regcache *regcache) | |
d02ed0bb MM |
2118 | { |
2119 | } | |
2120 | ||
f6ac5f3d | 2121 | /* "store_registers" method for prec over corefile. */ |
d02ed0bb | 2122 | |
f6ac5f3d PA |
2123 | void |
2124 | record_full_core_target::store_registers (struct regcache *regcache, | |
2125 | int regno) | |
d02ed0bb | 2126 | { |
88d1aa9d | 2127 | if (record_full_gdb_operation_disable) |
c8ec2f33 | 2128 | record_full_core_regbuf->raw_supply (regno, *regcache); |
d02ed0bb MM |
2129 | else |
2130 | error (_("You can't do that without a process to debug.")); | |
2131 | } | |
2132 | ||
f6ac5f3d | 2133 | /* "xfer_partial" method for prec over corefile. */ |
d02ed0bb | 2134 | |
f6ac5f3d PA |
2135 | enum target_xfer_status |
2136 | record_full_core_target::xfer_partial (enum target_object object, | |
2137 | const char *annex, gdb_byte *readbuf, | |
2138 | const gdb_byte *writebuf, ULONGEST offset, | |
2139 | ULONGEST len, ULONGEST *xfered_len) | |
d02ed0bb MM |
2140 | { |
2141 | if (object == TARGET_OBJECT_MEMORY) | |
2142 | { | |
88d1aa9d | 2143 | if (record_full_gdb_operation_disable || !writebuf) |
d02ed0bb MM |
2144 | { |
2145 | struct target_section *p; | |
2146 | ||
88d1aa9d | 2147 | for (p = record_full_core_start; p < record_full_core_end; p++) |
d02ed0bb MM |
2148 | { |
2149 | if (offset >= p->addr) | |
2150 | { | |
88d1aa9d | 2151 | struct record_full_core_buf_entry *entry; |
d02ed0bb MM |
2152 | ULONGEST sec_offset; |
2153 | ||
2154 | if (offset >= p->endaddr) | |
2155 | continue; | |
2156 | ||
2157 | if (offset + len > p->endaddr) | |
2158 | len = p->endaddr - offset; | |
2159 | ||
2160 | sec_offset = offset - p->addr; | |
2161 | ||
2162 | /* Read readbuf or write writebuf p, offset, len. */ | |
2163 | /* Check flags. */ | |
2164 | if (p->the_bfd_section->flags & SEC_CONSTRUCTOR | |
2165 | || (p->the_bfd_section->flags & SEC_HAS_CONTENTS) == 0) | |
2166 | { | |
2167 | if (readbuf) | |
2168 | memset (readbuf, 0, len); | |
9b409511 YQ |
2169 | |
2170 | *xfered_len = len; | |
2171 | return TARGET_XFER_OK; | |
d02ed0bb | 2172 | } |
88d1aa9d MM |
2173 | /* Get record_full_core_buf_entry. */ |
2174 | for (entry = record_full_core_buf_list; entry; | |
d02ed0bb MM |
2175 | entry = entry->prev) |
2176 | if (entry->p == p) | |
2177 | break; | |
2178 | if (writebuf) | |
2179 | { | |
2180 | if (!entry) | |
2181 | { | |
2182 | /* Add a new entry. */ | |
8d749320 | 2183 | entry = XNEW (struct record_full_core_buf_entry); |
d02ed0bb | 2184 | entry->p = p; |
2b2848e2 DE |
2185 | if (!bfd_malloc_and_get_section |
2186 | (p->the_bfd_section->owner, | |
2187 | p->the_bfd_section, | |
2188 | &entry->buf)) | |
d02ed0bb MM |
2189 | { |
2190 | xfree (entry); | |
9b409511 | 2191 | return TARGET_XFER_EOF; |
d02ed0bb | 2192 | } |
88d1aa9d MM |
2193 | entry->prev = record_full_core_buf_list; |
2194 | record_full_core_buf_list = entry; | |
d02ed0bb MM |
2195 | } |
2196 | ||
2197 | memcpy (entry->buf + sec_offset, writebuf, | |
2198 | (size_t) len); | |
2199 | } | |
2200 | else | |
2201 | { | |
2202 | if (!entry) | |
b6a8c27b PA |
2203 | return this->beneath ()->xfer_partial (object, annex, |
2204 | readbuf, writebuf, | |
2205 | offset, len, | |
2206 | xfered_len); | |
d02ed0bb MM |
2207 | |
2208 | memcpy (readbuf, entry->buf + sec_offset, | |
2209 | (size_t) len); | |
2210 | } | |
2211 | ||
9b409511 YQ |
2212 | *xfered_len = len; |
2213 | return TARGET_XFER_OK; | |
d02ed0bb MM |
2214 | } |
2215 | } | |
2216 | ||
2ed4b548 | 2217 | return TARGET_XFER_E_IO; |
d02ed0bb MM |
2218 | } |
2219 | else | |
2220 | error (_("You can't do that without a process to debug.")); | |
2221 | } | |
2222 | ||
b6a8c27b PA |
2223 | return this->beneath ()->xfer_partial (object, annex, |
2224 | readbuf, writebuf, offset, len, | |
2225 | xfered_len); | |
d02ed0bb MM |
2226 | } |
2227 | ||
f6ac5f3d | 2228 | /* "insert_breakpoint" method for prec over corefile. */ |
d02ed0bb | 2229 | |
f6ac5f3d PA |
2230 | int |
2231 | record_full_core_target::insert_breakpoint (struct gdbarch *gdbarch, | |
2232 | struct bp_target_info *bp_tgt) | |
d02ed0bb MM |
2233 | { |
2234 | return 0; | |
2235 | } | |
2236 | ||
f6ac5f3d | 2237 | /* "remove_breakpoint" method for prec over corefile. */ |
d02ed0bb | 2238 | |
f6ac5f3d PA |
2239 | int |
2240 | record_full_core_target::remove_breakpoint (struct gdbarch *gdbarch, | |
2241 | struct bp_target_info *bp_tgt, | |
2242 | enum remove_bp_reason reason) | |
d02ed0bb MM |
2243 | { |
2244 | return 0; | |
2245 | } | |
2246 | ||
f6ac5f3d | 2247 | /* "has_execution" method for prec over corefile. */ |
d02ed0bb | 2248 | |
57810aa7 | 2249 | bool |
f6ac5f3d | 2250 | record_full_core_target::has_execution (ptid_t the_ptid) |
d02ed0bb | 2251 | { |
57810aa7 | 2252 | return true; |
d02ed0bb MM |
2253 | } |
2254 | ||
d02ed0bb MM |
2255 | /* Record log save-file format |
2256 | Version 1 (never released) | |
2257 | ||
2258 | Header: | |
2259 | 4 bytes: magic number htonl(0x20090829). | |
2260 | NOTE: be sure to change whenever this file format changes! | |
2261 | ||
2262 | Records: | |
88d1aa9d MM |
2263 | record_full_end: |
2264 | 1 byte: record type (record_full_end, see enum record_full_type). | |
2265 | record_full_reg: | |
2266 | 1 byte: record type (record_full_reg, see enum record_full_type). | |
d02ed0bb MM |
2267 | 8 bytes: register id (network byte order). |
2268 | MAX_REGISTER_SIZE bytes: register value. | |
88d1aa9d MM |
2269 | record_full_mem: |
2270 | 1 byte: record type (record_full_mem, see enum record_full_type). | |
d02ed0bb MM |
2271 | 8 bytes: memory length (network byte order). |
2272 | 8 bytes: memory address (network byte order). | |
2273 | n bytes: memory value (n == memory length). | |
2274 | ||
2275 | Version 2 | |
2276 | 4 bytes: magic number netorder32(0x20091016). | |
2277 | NOTE: be sure to change whenever this file format changes! | |
2278 | ||
2279 | Records: | |
88d1aa9d MM |
2280 | record_full_end: |
2281 | 1 byte: record type (record_full_end, see enum record_full_type). | |
d02ed0bb MM |
2282 | 4 bytes: signal |
2283 | 4 bytes: instruction count | |
88d1aa9d MM |
2284 | record_full_reg: |
2285 | 1 byte: record type (record_full_reg, see enum record_full_type). | |
d02ed0bb MM |
2286 | 4 bytes: register id (network byte order). |
2287 | n bytes: register value (n == actual register size). | |
2288 | (eg. 4 bytes for x86 general registers). | |
88d1aa9d MM |
2289 | record_full_mem: |
2290 | 1 byte: record type (record_full_mem, see enum record_full_type). | |
d02ed0bb MM |
2291 | 4 bytes: memory length (network byte order). |
2292 | 8 bytes: memory address (network byte order). | |
2293 | n bytes: memory value (n == memory length). | |
2294 | ||
2295 | */ | |
2296 | ||
2297 | /* bfdcore_read -- read bytes from a core file section. */ | |
2298 | ||
2299 | static inline void | |
2300 | bfdcore_read (bfd *obfd, asection *osec, void *buf, int len, int *offset) | |
2301 | { | |
2302 | int ret = bfd_get_section_contents (obfd, osec, buf, *offset, len); | |
2303 | ||
2304 | if (ret) | |
2305 | *offset += len; | |
2306 | else | |
2307 | error (_("Failed to read %d bytes from core file %s ('%s')."), | |
2308 | len, bfd_get_filename (obfd), | |
2309 | bfd_errmsg (bfd_get_error ())); | |
2310 | } | |
2311 | ||
2312 | static inline uint64_t | |
2313 | netorder64 (uint64_t input) | |
2314 | { | |
2315 | uint64_t ret; | |
2316 | ||
2317 | store_unsigned_integer ((gdb_byte *) &ret, sizeof (ret), | |
2318 | BFD_ENDIAN_BIG, input); | |
2319 | return ret; | |
2320 | } | |
2321 | ||
2322 | static inline uint32_t | |
2323 | netorder32 (uint32_t input) | |
2324 | { | |
2325 | uint32_t ret; | |
2326 | ||
d02ed0bb MM |
2327 | store_unsigned_integer ((gdb_byte *) &ret, sizeof (ret), |
2328 | BFD_ENDIAN_BIG, input); | |
2329 | return ret; | |
2330 | } | |
2331 | ||
2332 | /* Restore the execution log from a core_bfd file. */ | |
2333 | static void | |
88d1aa9d | 2334 | record_full_restore (void) |
d02ed0bb MM |
2335 | { |
2336 | uint32_t magic; | |
88d1aa9d | 2337 | struct record_full_entry *rec; |
d02ed0bb MM |
2338 | asection *osec; |
2339 | uint32_t osec_size; | |
2340 | int bfd_offset = 0; | |
2341 | struct regcache *regcache; | |
2342 | ||
2343 | /* We restore the execution log from the open core bfd, | |
2344 | if there is one. */ | |
2345 | if (core_bfd == NULL) | |
2346 | return; | |
2347 | ||
88d1aa9d MM |
2348 | /* "record_full_restore" can only be called when record list is empty. */ |
2349 | gdb_assert (record_full_first.next == NULL); | |
d02ed0bb MM |
2350 | |
2351 | if (record_debug) | |
2352 | fprintf_unfiltered (gdb_stdlog, "Restoring recording from core file.\n"); | |
2353 | ||
2354 | /* Now need to find our special note section. */ | |
2355 | osec = bfd_get_section_by_name (core_bfd, "null0"); | |
2356 | if (record_debug) | |
2357 | fprintf_unfiltered (gdb_stdlog, "Find precord section %s.\n", | |
2358 | osec ? "succeeded" : "failed"); | |
2359 | if (osec == NULL) | |
2360 | return; | |
2361 | osec_size = bfd_section_size (core_bfd, osec); | |
2362 | if (record_debug) | |
2363 | fprintf_unfiltered (gdb_stdlog, "%s", bfd_section_name (core_bfd, osec)); | |
2364 | ||
2365 | /* Check the magic code. */ | |
2366 | bfdcore_read (core_bfd, osec, &magic, sizeof (magic), &bfd_offset); | |
88d1aa9d | 2367 | if (magic != RECORD_FULL_FILE_MAGIC) |
d02ed0bb MM |
2368 | error (_("Version mis-match or file format error in core file %s."), |
2369 | bfd_get_filename (core_bfd)); | |
2370 | if (record_debug) | |
2371 | fprintf_unfiltered (gdb_stdlog, | |
2372 | " Reading 4-byte magic cookie " | |
88d1aa9d | 2373 | "RECORD_FULL_FILE_MAGIC (0x%s)\n", |
d02ed0bb MM |
2374 | phex_nz (netorder32 (magic), 4)); |
2375 | ||
88d1aa9d MM |
2376 | /* Restore the entries in recfd into record_full_arch_list_head and |
2377 | record_full_arch_list_tail. */ | |
2378 | record_full_arch_list_head = NULL; | |
2379 | record_full_arch_list_tail = NULL; | |
2380 | record_full_insn_num = 0; | |
d02ed0bb | 2381 | |
1ddbba9d | 2382 | TRY |
d02ed0bb | 2383 | { |
1ddbba9d TT |
2384 | regcache = get_current_regcache (); |
2385 | ||
2386 | while (1) | |
2387 | { | |
2388 | uint8_t rectype; | |
2389 | uint32_t regnum, len, signal, count; | |
2390 | uint64_t addr; | |
d02ed0bb | 2391 | |
1ddbba9d TT |
2392 | /* We are finished when offset reaches osec_size. */ |
2393 | if (bfd_offset >= osec_size) | |
2394 | break; | |
2395 | bfdcore_read (core_bfd, osec, &rectype, sizeof (rectype), &bfd_offset); | |
d02ed0bb | 2396 | |
1ddbba9d TT |
2397 | switch (rectype) |
2398 | { | |
2399 | case record_full_reg: /* reg */ | |
2400 | /* Get register number to regnum. */ | |
2401 | bfdcore_read (core_bfd, osec, ®num, | |
2402 | sizeof (regnum), &bfd_offset); | |
2403 | regnum = netorder32 (regnum); | |
d02ed0bb | 2404 | |
1ddbba9d | 2405 | rec = record_full_reg_alloc (regcache, regnum); |
d02ed0bb | 2406 | |
1ddbba9d TT |
2407 | /* Get val. */ |
2408 | bfdcore_read (core_bfd, osec, record_full_get_loc (rec), | |
2409 | rec->u.reg.len, &bfd_offset); | |
d02ed0bb | 2410 | |
1ddbba9d TT |
2411 | if (record_debug) |
2412 | fprintf_unfiltered (gdb_stdlog, | |
2413 | " Reading register %d (1 " | |
2414 | "plus %lu plus %d bytes)\n", | |
2415 | rec->u.reg.num, | |
2416 | (unsigned long) sizeof (regnum), | |
2417 | rec->u.reg.len); | |
2418 | break; | |
d02ed0bb | 2419 | |
1ddbba9d TT |
2420 | case record_full_mem: /* mem */ |
2421 | /* Get len. */ | |
2422 | bfdcore_read (core_bfd, osec, &len, | |
2423 | sizeof (len), &bfd_offset); | |
2424 | len = netorder32 (len); | |
d02ed0bb | 2425 | |
1ddbba9d TT |
2426 | /* Get addr. */ |
2427 | bfdcore_read (core_bfd, osec, &addr, | |
2428 | sizeof (addr), &bfd_offset); | |
2429 | addr = netorder64 (addr); | |
2430 | ||
2431 | rec = record_full_mem_alloc (addr, len); | |
2432 | ||
2433 | /* Get val. */ | |
2434 | bfdcore_read (core_bfd, osec, record_full_get_loc (rec), | |
2435 | rec->u.mem.len, &bfd_offset); | |
2436 | ||
2437 | if (record_debug) | |
2438 | fprintf_unfiltered (gdb_stdlog, | |
2439 | " Reading memory %s (1 plus " | |
2440 | "%lu plus %lu plus %d bytes)\n", | |
2441 | paddress (get_current_arch (), | |
2442 | rec->u.mem.addr), | |
2443 | (unsigned long) sizeof (addr), | |
2444 | (unsigned long) sizeof (len), | |
2445 | rec->u.mem.len); | |
2446 | break; | |
2447 | ||
2448 | case record_full_end: /* end */ | |
2449 | rec = record_full_end_alloc (); | |
2450 | record_full_insn_num ++; | |
2451 | ||
2452 | /* Get signal value. */ | |
2453 | bfdcore_read (core_bfd, osec, &signal, | |
2454 | sizeof (signal), &bfd_offset); | |
2455 | signal = netorder32 (signal); | |
2456 | rec->u.end.sigval = (enum gdb_signal) signal; | |
2457 | ||
2458 | /* Get insn count. */ | |
2459 | bfdcore_read (core_bfd, osec, &count, | |
2460 | sizeof (count), &bfd_offset); | |
2461 | count = netorder32 (count); | |
2462 | rec->u.end.insn_num = count; | |
2463 | record_full_insn_count = count + 1; | |
2464 | if (record_debug) | |
2465 | fprintf_unfiltered (gdb_stdlog, | |
2466 | " Reading record_full_end (1 + " | |
2467 | "%lu + %lu bytes), offset == %s\n", | |
2468 | (unsigned long) sizeof (signal), | |
2469 | (unsigned long) sizeof (count), | |
2470 | paddress (get_current_arch (), | |
2471 | bfd_offset)); | |
2472 | break; | |
2473 | ||
2474 | default: | |
2475 | error (_("Bad entry type in core file %s."), | |
2476 | bfd_get_filename (core_bfd)); | |
2477 | break; | |
2478 | } | |
d02ed0bb | 2479 | |
1ddbba9d TT |
2480 | /* Add rec to record arch list. */ |
2481 | record_full_arch_list_add (rec); | |
2482 | } | |
2483 | } | |
2484 | CATCH (ex, RETURN_MASK_ALL) | |
2485 | { | |
2486 | record_full_list_release (record_full_arch_list_tail); | |
2487 | throw_exception (ex); | |
2488 | } | |
2489 | END_CATCH | |
d02ed0bb | 2490 | |
88d1aa9d MM |
2491 | /* Add record_full_arch_list_head to the end of record list. */ |
2492 | record_full_first.next = record_full_arch_list_head; | |
2493 | record_full_arch_list_head->prev = &record_full_first; | |
2494 | record_full_arch_list_tail->next = NULL; | |
2495 | record_full_list = &record_full_first; | |
d02ed0bb | 2496 | |
88d1aa9d MM |
2497 | /* Update record_full_insn_max_num. */ |
2498 | if (record_full_insn_num > record_full_insn_max_num) | |
d02ed0bb | 2499 | { |
88d1aa9d | 2500 | record_full_insn_max_num = record_full_insn_num; |
7ee70bf5 | 2501 | warning (_("Auto increase record/replay buffer limit to %u."), |
88d1aa9d | 2502 | record_full_insn_max_num); |
d02ed0bb MM |
2503 | } |
2504 | ||
2505 | /* Succeeded. */ | |
2506 | printf_filtered (_("Restored records from core file %s.\n"), | |
2507 | bfd_get_filename (core_bfd)); | |
2508 | ||
08d72866 | 2509 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); |
d02ed0bb MM |
2510 | } |
2511 | ||
2512 | /* bfdcore_write -- write bytes into a core file section. */ | |
2513 | ||
2514 | static inline void | |
2515 | bfdcore_write (bfd *obfd, asection *osec, void *buf, int len, int *offset) | |
2516 | { | |
2517 | int ret = bfd_set_section_contents (obfd, osec, buf, *offset, len); | |
2518 | ||
2519 | if (ret) | |
2520 | *offset += len; | |
2521 | else | |
2522 | error (_("Failed to write %d bytes to core file %s ('%s')."), | |
2523 | len, bfd_get_filename (obfd), | |
2524 | bfd_errmsg (bfd_get_error ())); | |
2525 | } | |
2526 | ||
2527 | /* Restore the execution log from a file. We use a modified elf | |
2528 | corefile format, with an extra section for our data. */ | |
2529 | ||
2530 | static void | |
41243651 | 2531 | cmd_record_full_restore (const char *args, int from_tty) |
d02ed0bb MM |
2532 | { |
2533 | core_file_command (args, from_tty); | |
d9f719f1 | 2534 | record_full_open (args, from_tty); |
d02ed0bb MM |
2535 | } |
2536 | ||
d02ed0bb MM |
2537 | /* Save the execution log to a file. We use a modified elf corefile |
2538 | format, with an extra section for our data. */ | |
2539 | ||
f6ac5f3d PA |
2540 | void |
2541 | record_full_base_target::save_record (const char *recfilename) | |
d02ed0bb | 2542 | { |
88d1aa9d | 2543 | struct record_full_entry *cur_record_full_list; |
d02ed0bb MM |
2544 | uint32_t magic; |
2545 | struct regcache *regcache; | |
2546 | struct gdbarch *gdbarch; | |
d02ed0bb MM |
2547 | int save_size = 0; |
2548 | asection *osec = NULL; | |
2549 | int bfd_offset = 0; | |
2550 | ||
2551 | /* Open the save file. */ | |
2552 | if (record_debug) | |
2553 | fprintf_unfiltered (gdb_stdlog, "Saving execution log to core file '%s'\n", | |
2554 | recfilename); | |
2555 | ||
2556 | /* Open the output file. */ | |
bef155c3 TT |
2557 | gdb_bfd_ref_ptr obfd (create_gcore_bfd (recfilename)); |
2558 | ||
2559 | /* Arrange to remove the output file on failure. */ | |
2560 | gdb::unlinker unlink_file (recfilename); | |
d02ed0bb | 2561 | |
88d1aa9d MM |
2562 | /* Save the current record entry to "cur_record_full_list". */ |
2563 | cur_record_full_list = record_full_list; | |
d02ed0bb MM |
2564 | |
2565 | /* Get the values of regcache and gdbarch. */ | |
2566 | regcache = get_current_regcache (); | |
ac7936df | 2567 | gdbarch = regcache->arch (); |
d02ed0bb MM |
2568 | |
2569 | /* Disable the GDB operation record. */ | |
07036511 TT |
2570 | scoped_restore restore_operation_disable |
2571 | = record_full_gdb_operation_disable_set (); | |
d02ed0bb MM |
2572 | |
2573 | /* Reverse execute to the begin of record list. */ | |
2574 | while (1) | |
2575 | { | |
2576 | /* Check for beginning and end of log. */ | |
88d1aa9d | 2577 | if (record_full_list == &record_full_first) |
d02ed0bb MM |
2578 | break; |
2579 | ||
88d1aa9d | 2580 | record_full_exec_insn (regcache, gdbarch, record_full_list); |
d02ed0bb | 2581 | |
88d1aa9d MM |
2582 | if (record_full_list->prev) |
2583 | record_full_list = record_full_list->prev; | |
d02ed0bb MM |
2584 | } |
2585 | ||
2586 | /* Compute the size needed for the extra bfd section. */ | |
2587 | save_size = 4; /* magic cookie */ | |
88d1aa9d MM |
2588 | for (record_full_list = record_full_first.next; record_full_list; |
2589 | record_full_list = record_full_list->next) | |
2590 | switch (record_full_list->type) | |
d02ed0bb | 2591 | { |
88d1aa9d | 2592 | case record_full_end: |
d02ed0bb MM |
2593 | save_size += 1 + 4 + 4; |
2594 | break; | |
88d1aa9d MM |
2595 | case record_full_reg: |
2596 | save_size += 1 + 4 + record_full_list->u.reg.len; | |
d02ed0bb | 2597 | break; |
88d1aa9d MM |
2598 | case record_full_mem: |
2599 | save_size += 1 + 4 + 8 + record_full_list->u.mem.len; | |
d02ed0bb MM |
2600 | break; |
2601 | } | |
2602 | ||
2603 | /* Make the new bfd section. */ | |
bef155c3 | 2604 | osec = bfd_make_section_anyway_with_flags (obfd.get (), "precord", |
d02ed0bb MM |
2605 | SEC_HAS_CONTENTS |
2606 | | SEC_READONLY); | |
2607 | if (osec == NULL) | |
2608 | error (_("Failed to create 'precord' section for corefile %s: %s"), | |
2609 | recfilename, | |
2610 | bfd_errmsg (bfd_get_error ())); | |
bef155c3 TT |
2611 | bfd_set_section_size (obfd.get (), osec, save_size); |
2612 | bfd_set_section_vma (obfd.get (), osec, 0); | |
2613 | bfd_set_section_alignment (obfd.get (), osec, 0); | |
2614 | bfd_section_lma (obfd.get (), osec) = 0; | |
d02ed0bb MM |
2615 | |
2616 | /* Save corefile state. */ | |
bef155c3 | 2617 | write_gcore_file (obfd.get ()); |
d02ed0bb MM |
2618 | |
2619 | /* Write out the record log. */ | |
2620 | /* Write the magic code. */ | |
88d1aa9d | 2621 | magic = RECORD_FULL_FILE_MAGIC; |
d02ed0bb MM |
2622 | if (record_debug) |
2623 | fprintf_unfiltered (gdb_stdlog, | |
2624 | " Writing 4-byte magic cookie " | |
88d1aa9d | 2625 | "RECORD_FULL_FILE_MAGIC (0x%s)\n", |
d02ed0bb | 2626 | phex_nz (magic, 4)); |
bef155c3 | 2627 | bfdcore_write (obfd.get (), osec, &magic, sizeof (magic), &bfd_offset); |
d02ed0bb MM |
2628 | |
2629 | /* Save the entries to recfd and forward execute to the end of | |
2630 | record list. */ | |
88d1aa9d | 2631 | record_full_list = &record_full_first; |
d02ed0bb MM |
2632 | while (1) |
2633 | { | |
2634 | /* Save entry. */ | |
88d1aa9d | 2635 | if (record_full_list != &record_full_first) |
d02ed0bb MM |
2636 | { |
2637 | uint8_t type; | |
2638 | uint32_t regnum, len, signal, count; | |
2639 | uint64_t addr; | |
2640 | ||
88d1aa9d | 2641 | type = record_full_list->type; |
bef155c3 | 2642 | bfdcore_write (obfd.get (), osec, &type, sizeof (type), &bfd_offset); |
d02ed0bb | 2643 | |
88d1aa9d | 2644 | switch (record_full_list->type) |
d02ed0bb | 2645 | { |
88d1aa9d | 2646 | case record_full_reg: /* reg */ |
d02ed0bb MM |
2647 | if (record_debug) |
2648 | fprintf_unfiltered (gdb_stdlog, | |
2649 | " Writing register %d (1 " | |
2650 | "plus %lu plus %d bytes)\n", | |
88d1aa9d | 2651 | record_full_list->u.reg.num, |
d02ed0bb | 2652 | (unsigned long) sizeof (regnum), |
88d1aa9d | 2653 | record_full_list->u.reg.len); |
d02ed0bb MM |
2654 | |
2655 | /* Write regnum. */ | |
88d1aa9d | 2656 | regnum = netorder32 (record_full_list->u.reg.num); |
bef155c3 | 2657 | bfdcore_write (obfd.get (), osec, ®num, |
d02ed0bb MM |
2658 | sizeof (regnum), &bfd_offset); |
2659 | ||
2660 | /* Write regval. */ | |
bef155c3 | 2661 | bfdcore_write (obfd.get (), osec, |
88d1aa9d MM |
2662 | record_full_get_loc (record_full_list), |
2663 | record_full_list->u.reg.len, &bfd_offset); | |
d02ed0bb MM |
2664 | break; |
2665 | ||
88d1aa9d | 2666 | case record_full_mem: /* mem */ |
d02ed0bb MM |
2667 | if (record_debug) |
2668 | fprintf_unfiltered (gdb_stdlog, | |
2669 | " Writing memory %s (1 plus " | |
2670 | "%lu plus %lu plus %d bytes)\n", | |
2671 | paddress (gdbarch, | |
88d1aa9d | 2672 | record_full_list->u.mem.addr), |
d02ed0bb MM |
2673 | (unsigned long) sizeof (addr), |
2674 | (unsigned long) sizeof (len), | |
88d1aa9d | 2675 | record_full_list->u.mem.len); |
d02ed0bb MM |
2676 | |
2677 | /* Write memlen. */ | |
88d1aa9d | 2678 | len = netorder32 (record_full_list->u.mem.len); |
bef155c3 TT |
2679 | bfdcore_write (obfd.get (), osec, &len, sizeof (len), |
2680 | &bfd_offset); | |
d02ed0bb MM |
2681 | |
2682 | /* Write memaddr. */ | |
88d1aa9d | 2683 | addr = netorder64 (record_full_list->u.mem.addr); |
bef155c3 | 2684 | bfdcore_write (obfd.get (), osec, &addr, |
d02ed0bb MM |
2685 | sizeof (addr), &bfd_offset); |
2686 | ||
2687 | /* Write memval. */ | |
bef155c3 | 2688 | bfdcore_write (obfd.get (), osec, |
88d1aa9d MM |
2689 | record_full_get_loc (record_full_list), |
2690 | record_full_list->u.mem.len, &bfd_offset); | |
d02ed0bb MM |
2691 | break; |
2692 | ||
88d1aa9d | 2693 | case record_full_end: |
d02ed0bb MM |
2694 | if (record_debug) |
2695 | fprintf_unfiltered (gdb_stdlog, | |
88d1aa9d | 2696 | " Writing record_full_end (1 + " |
d02ed0bb MM |
2697 | "%lu + %lu bytes)\n", |
2698 | (unsigned long) sizeof (signal), | |
2699 | (unsigned long) sizeof (count)); | |
2700 | /* Write signal value. */ | |
88d1aa9d | 2701 | signal = netorder32 (record_full_list->u.end.sigval); |
bef155c3 | 2702 | bfdcore_write (obfd.get (), osec, &signal, |
d02ed0bb MM |
2703 | sizeof (signal), &bfd_offset); |
2704 | ||
2705 | /* Write insn count. */ | |
88d1aa9d | 2706 | count = netorder32 (record_full_list->u.end.insn_num); |
bef155c3 | 2707 | bfdcore_write (obfd.get (), osec, &count, |
d02ed0bb MM |
2708 | sizeof (count), &bfd_offset); |
2709 | break; | |
2710 | } | |
2711 | } | |
2712 | ||
2713 | /* Execute entry. */ | |
88d1aa9d | 2714 | record_full_exec_insn (regcache, gdbarch, record_full_list); |
d02ed0bb | 2715 | |
88d1aa9d MM |
2716 | if (record_full_list->next) |
2717 | record_full_list = record_full_list->next; | |
d02ed0bb MM |
2718 | else |
2719 | break; | |
2720 | } | |
2721 | ||
88d1aa9d | 2722 | /* Reverse execute to cur_record_full_list. */ |
d02ed0bb MM |
2723 | while (1) |
2724 | { | |
2725 | /* Check for beginning and end of log. */ | |
88d1aa9d | 2726 | if (record_full_list == cur_record_full_list) |
d02ed0bb MM |
2727 | break; |
2728 | ||
88d1aa9d | 2729 | record_full_exec_insn (regcache, gdbarch, record_full_list); |
d02ed0bb | 2730 | |
88d1aa9d MM |
2731 | if (record_full_list->prev) |
2732 | record_full_list = record_full_list->prev; | |
d02ed0bb MM |
2733 | } |
2734 | ||
bef155c3 | 2735 | unlink_file.keep (); |
d02ed0bb MM |
2736 | |
2737 | /* Succeeded. */ | |
2738 | printf_filtered (_("Saved core file %s with execution log.\n"), | |
2739 | recfilename); | |
2740 | } | |
2741 | ||
88d1aa9d | 2742 | /* record_full_goto_insn -- rewind the record log (forward or backward, |
d02ed0bb MM |
2743 | depending on DIR) to the given entry, changing the program state |
2744 | correspondingly. */ | |
2745 | ||
2746 | static void | |
88d1aa9d MM |
2747 | record_full_goto_insn (struct record_full_entry *entry, |
2748 | enum exec_direction_kind dir) | |
d02ed0bb | 2749 | { |
07036511 TT |
2750 | scoped_restore restore_operation_disable |
2751 | = record_full_gdb_operation_disable_set (); | |
d02ed0bb | 2752 | struct regcache *regcache = get_current_regcache (); |
ac7936df | 2753 | struct gdbarch *gdbarch = regcache->arch (); |
d02ed0bb MM |
2754 | |
2755 | /* Assume everything is valid: we will hit the entry, | |
2756 | and we will not hit the end of the recording. */ | |
2757 | ||
2758 | if (dir == EXEC_FORWARD) | |
88d1aa9d | 2759 | record_full_list = record_full_list->next; |
d02ed0bb MM |
2760 | |
2761 | do | |
2762 | { | |
88d1aa9d | 2763 | record_full_exec_insn (regcache, gdbarch, record_full_list); |
d02ed0bb | 2764 | if (dir == EXEC_REVERSE) |
88d1aa9d | 2765 | record_full_list = record_full_list->prev; |
d02ed0bb | 2766 | else |
88d1aa9d MM |
2767 | record_full_list = record_full_list->next; |
2768 | } while (record_full_list != entry); | |
d02ed0bb MM |
2769 | } |
2770 | ||
2771 | /* Alias for "target record-full". */ | |
2772 | ||
2773 | static void | |
981a3fb3 | 2774 | cmd_record_full_start (const char *args, int from_tty) |
d02ed0bb | 2775 | { |
95a6b0a1 | 2776 | execute_command ("target record-full", from_tty); |
d02ed0bb MM |
2777 | } |
2778 | ||
2779 | static void | |
eb4c3f4a | 2780 | set_record_full_insn_max_num (const char *args, int from_tty, |
88d1aa9d | 2781 | struct cmd_list_element *c) |
d02ed0bb | 2782 | { |
7ee70bf5 | 2783 | if (record_full_insn_num > record_full_insn_max_num) |
d02ed0bb | 2784 | { |
88d1aa9d MM |
2785 | /* Count down record_full_insn_num while releasing records from list. */ |
2786 | while (record_full_insn_num > record_full_insn_max_num) | |
d02ed0bb | 2787 | { |
88d1aa9d MM |
2788 | record_full_list_release_first (); |
2789 | record_full_insn_num--; | |
d02ed0bb MM |
2790 | } |
2791 | } | |
2792 | } | |
2793 | ||
2794 | /* The "set record full" command. */ | |
2795 | ||
2796 | static void | |
981a3fb3 | 2797 | set_record_full_command (const char *args, int from_tty) |
d02ed0bb MM |
2798 | { |
2799 | printf_unfiltered (_("\"set record full\" must be followed " | |
981a3fb3 | 2800 | "by an appropriate subcommand.\n")); |
d02ed0bb MM |
2801 | help_list (set_record_full_cmdlist, "set record full ", all_commands, |
2802 | gdb_stdout); | |
2803 | } | |
2804 | ||
2805 | /* The "show record full" command. */ | |
2806 | ||
2807 | static void | |
981a3fb3 | 2808 | show_record_full_command (const char *args, int from_tty) |
d02ed0bb MM |
2809 | { |
2810 | cmd_show_list (show_record_full_cmdlist, from_tty, ""); | |
2811 | } | |
2812 | ||
d02ed0bb MM |
2813 | void |
2814 | _initialize_record_full (void) | |
2815 | { | |
2816 | struct cmd_list_element *c; | |
2817 | ||
88d1aa9d MM |
2818 | /* Init record_full_first. */ |
2819 | record_full_first.prev = NULL; | |
2820 | record_full_first.next = NULL; | |
2821 | record_full_first.type = record_full_end; | |
d02ed0bb | 2822 | |
d9f719f1 PA |
2823 | add_target (record_full_target_info, record_full_open); |
2824 | add_deprecated_target_alias (record_full_target_info, "record"); | |
2825 | add_target (record_full_core_target_info, record_full_open); | |
d02ed0bb | 2826 | |
88d1aa9d | 2827 | add_prefix_cmd ("full", class_obscure, cmd_record_full_start, |
d02ed0bb MM |
2828 | _("Start full execution recording."), &record_full_cmdlist, |
2829 | "record full ", 0, &record_cmdlist); | |
2830 | ||
88d1aa9d | 2831 | c = add_cmd ("restore", class_obscure, cmd_record_full_restore, |
d02ed0bb MM |
2832 | _("Restore the execution log from a file.\n\ |
2833 | Argument is filename. File must be created with 'record save'."), | |
2834 | &record_full_cmdlist); | |
2835 | set_cmd_completer (c, filename_completer); | |
2836 | ||
2837 | /* Deprecate the old version without "full" prefix. */ | |
2838 | c = add_alias_cmd ("restore", "full restore", class_obscure, 1, | |
2839 | &record_cmdlist); | |
2840 | set_cmd_completer (c, filename_completer); | |
2841 | deprecate_cmd (c, "record full restore"); | |
2842 | ||
2843 | add_prefix_cmd ("full", class_support, set_record_full_command, | |
2844 | _("Set record options"), &set_record_full_cmdlist, | |
2845 | "set record full ", 0, &set_record_cmdlist); | |
2846 | ||
2847 | add_prefix_cmd ("full", class_support, show_record_full_command, | |
2848 | _("Show record options"), &show_record_full_cmdlist, | |
2849 | "show record full ", 0, &show_record_cmdlist); | |
2850 | ||
2851 | /* Record instructions number limit command. */ | |
2852 | add_setshow_boolean_cmd ("stop-at-limit", no_class, | |
88d1aa9d | 2853 | &record_full_stop_at_limit, _("\ |
d02ed0bb MM |
2854 | Set whether record/replay stops when record/replay buffer becomes full."), _("\ |
2855 | Show whether record/replay stops when record/replay buffer becomes full."), | |
2856 | _("Default is ON.\n\ | |
2857 | When ON, if the record/replay buffer becomes full, ask user what to do.\n\ | |
2858 | When OFF, if the record/replay buffer becomes full,\n\ | |
2859 | delete the oldest recorded instruction to make room for each new one."), | |
2860 | NULL, NULL, | |
2861 | &set_record_full_cmdlist, &show_record_full_cmdlist); | |
2862 | ||
2863 | c = add_alias_cmd ("stop-at-limit", "full stop-at-limit", no_class, 1, | |
2864 | &set_record_cmdlist); | |
2865 | deprecate_cmd (c, "set record full stop-at-limit"); | |
2866 | ||
2867 | c = add_alias_cmd ("stop-at-limit", "full stop-at-limit", no_class, 1, | |
2868 | &show_record_cmdlist); | |
2869 | deprecate_cmd (c, "show record full stop-at-limit"); | |
2870 | ||
88d1aa9d MM |
2871 | add_setshow_uinteger_cmd ("insn-number-max", no_class, |
2872 | &record_full_insn_max_num, | |
d02ed0bb MM |
2873 | _("Set record/replay buffer limit."), |
2874 | _("Show record/replay buffer limit."), _("\ | |
2875 | Set the maximum number of instructions to be stored in the\n\ | |
f81d1120 PA |
2876 | record/replay buffer. A value of either \"unlimited\" or zero means no\n\ |
2877 | limit. Default is 200000."), | |
88d1aa9d | 2878 | set_record_full_insn_max_num, |
d02ed0bb MM |
2879 | NULL, &set_record_full_cmdlist, |
2880 | &show_record_full_cmdlist); | |
2881 | ||
2882 | c = add_alias_cmd ("insn-number-max", "full insn-number-max", no_class, 1, | |
2883 | &set_record_cmdlist); | |
2884 | deprecate_cmd (c, "set record full insn-number-max"); | |
2885 | ||
2886 | c = add_alias_cmd ("insn-number-max", "full insn-number-max", no_class, 1, | |
2887 | &show_record_cmdlist); | |
2888 | deprecate_cmd (c, "show record full insn-number-max"); | |
2889 | ||
88d1aa9d | 2890 | add_setshow_boolean_cmd ("memory-query", no_class, |
25ea693b | 2891 | &record_full_memory_query, _("\ |
d02ed0bb MM |
2892 | Set whether query if PREC cannot record memory change of next instruction."), |
2893 | _("\ | |
2894 | Show whether query if PREC cannot record memory change of next instruction."), | |
2895 | _("\ | |
2896 | Default is OFF.\n\ | |
2897 | When ON, query if PREC cannot record memory change of next instruction."), | |
2898 | NULL, NULL, | |
88d1aa9d MM |
2899 | &set_record_full_cmdlist, |
2900 | &show_record_full_cmdlist); | |
d02ed0bb MM |
2901 | |
2902 | c = add_alias_cmd ("memory-query", "full memory-query", no_class, 1, | |
2903 | &set_record_cmdlist); | |
2904 | deprecate_cmd (c, "set record full memory-query"); | |
2905 | ||
2906 | c = add_alias_cmd ("memory-query", "full memory-query", no_class, 1, | |
2907 | &show_record_cmdlist); | |
2908 | deprecate_cmd (c, "show record full memory-query"); | |
2909 | } |